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STS-81 was a January 1997 Space Shuttle Atlantis mission to the Mir space station.

STS-81 was the fifth of nine planned missions to Mir and the second one involving an exchange of U.S. astronauts. Astronaut John Blaha, who had been on Mir since 19 September 1996, was replaced by astronaut Jerry Linenger. Linenger spent more than four months on Mir. He returned to Earth on Space Shuttle Mission STS-84.
Atlantis carried the SPACEHAB double module providing additional middeck locker space for secondary experiments. During the five days of docked operations with Mir, the crews transferred water and supplies from one spacecraft to the other. A spacewalk by Linenger and one of his Russian cosmonaut crewmates occurred after the departure of Atlantis.

STS-81 was a January 1997 Space Shuttle Atlantis mission to the Mir space station.

STS-81 was the fifth of nine planned missions to Mir and the second one involving an exchange of U.S. astronauts. Astronaut John Blaha, who had been on Mir since 19 September 1996, was replaced by astronaut Jerry Linenger. Linenger spent more than four months on Mir. He returned to Earth on Space Shuttle Mission STS-84.
Atlantis carried the SPACEHAB double module providing additional middeck locker space for secondary experiments. During the five days of docked operations with Mir, the crews transferred water and supplies from one spacecraft to the other. A spacewalk by Linenger and one of his Russian cosmonaut crewmates occurred after the departure of Atlantis.

STS-71 was the third mission of the US/Russian Shuttle-Mir Program, which carried out the first Space Shuttle docking to Mir, a Russian space station. The mission used Space Shuttle Atlantis, which lifted off from launch pad 39A on 27 June 1995 from Kennedy Space Center, Florida. The mission delivered a relief crew of two cosmonauts, Anatoly Solovyev and Nikolai Budarin, to the station, along with recovering American Increment astronaut Norman Thagard, and was the first in a series of seven straight missions to the station flown by Atlantis.
The five-day docking marked the creation of the largest spacecraft ever placed into orbit at that time in history, the first ever on-orbit changeout of Shuttle crew members, and the 100th manned space launch by the United States. During the docked operations, the crews of the shuttle & station carried out various on-orbit joint US/Russian life sciences investigations aboard Spacelab/Mir and a logistical resupply of the Mir, along with the Shuttle Amateur Radio Experiment-II (SAREX-II) experiment.

Similar to the Eagle Crest Emblem version, however the yellow rays of the sun are embroidered differently. 

STS-71 was the third mission of the US/Russian Shuttle-Mir Program, which carried out the first Space Shuttle docking to Mir, a Russian space station. The mission used Space Shuttle Atlantis, which lifted off from launch pad 39A on 27 June 1995 from Kennedy Space Center, Florida. The mission delivered a relief crew of two cosmonauts, Anatoly Solovyev and Nikolai Budarin, to the station, along with recovering American Increment astronaut Norman Thagard, and was the first in a series of seven straight missions to the station flown by Atlantis.
The five-day docking marked the creation of the largest spacecraft ever placed into orbit at that time in history, the first ever on-orbit changeout of Shuttle crew members, and the 100th manned space launch by the United States. During the docked operations, the crews of the shuttle & station carried out various on-orbit joint US/Russian life sciences investigations aboard Spacelab/Mir and a logistical resupply of the Mir, along with the Shuttle Amateur Radio Experiment-II (SAREX-II) experiment.

The Eagle Crest version has a dark circle around the sun and lighter blue rays.

STS-71 was the third mission of the US/Russian Shuttle-Mir Program, which carried out the first Space Shuttle docking to Mir, a Russian space station. The mission used Space Shuttle Atlantis, which lifted off from launch pad 39A on 27 June 1995 from Kennedy Space Center, Florida. The mission delivered a relief crew of two cosmonauts, Anatoly Solovyev and Nikolai Budarin, to the station, along with recovering American Increment astronaut Norman Thagard, and was the first in a series of seven straight missions to the station flown by Atlantis.
The five-day docking marked the creation of the largest spacecraft ever placed into orbit at that time in history, the first ever on-orbit changeout of Shuttle crew members, and the 100th manned space launch by the United States. During the docked operations, the crews of the shuttle & station carried out various on-orbit joint US/Russian life sciences investigations aboard Spacelab/Mir and a logistical resupply of the Mir, along with the Shuttle Amateur Radio Experiment-II (SAREX-II) experiment.

This is likely the A-B Emblem version. Thick black borders around the flags and less detail on Mir (and no read thread on Mir). 

STS-68 was a human spaceflight mission using Space Shuttle Endeavour that launched from Kennedy Space Center, Florida on 1994-09-30. 
STS-68 marked second flight in 1994 of Space Radar Laboratory (first flight was STS-59 in April), part of NASA's Mission to Planet Earth. Flying SRL during different seasons allowed comparison of changes between first and second flights. SRL-2 was activated on flight day one, and around-the-clock observations conducted by astronauts split into two teams. Besides repeating data takes over same locations as on first flight, unusual events also imaged, including erupting volcano in Russia and islands of Japan after earthquake there. Also tested was ability of SRL-2 imaging radars, Spaceborne Imaging Radar-C (SIR-C) and X- band Synthetic Aperture Radar (X-SAR), to discern difference between such human-induced phenomena as an oil spill in the ocean and naturally occurring film. 

Similar to the modern A-B Emblem STS-68 patch, the Eagle Crest Emblem version has a black outline around the orbiter.

STS-68 was a human spaceflight mission using Space Shuttle Endeavour that launched from Kennedy Space Center, Florida on 1994-09-30. 
STS-68 marked second flight in 1994 of Space Radar Laboratory (first flight was STS-59 in April), part of NASA's Mission to Planet Earth. Flying SRL during different seasons allowed comparison of changes between first and second flights. SRL-2 was activated on flight day one, and around-the-clock observations conducted by astronauts split into two teams. Besides repeating data takes over same locations as on first flight, unusual events also imaged, including erupting volcano in Russia and islands of Japan after earthquake there. Also tested was ability of SRL-2 imaging radars, Spaceborne Imaging Radar-C (SIR-C) and X- band Synthetic Aperture Radar (X-SAR), to discern difference between such human-induced phenomena as an oil spill in the ocean and naturally occurring film. 

STS-68 was a human spaceflight mission using Space Shuttle Endeavour that launched from Kennedy Space Center, Florida on 1994-09-30. 
STS-68 marked second flight in 1994 of Space Radar Laboratory (first flight was STS-59 in April), part of NASA's Mission to Planet Earth. Flying SRL during different seasons allowed comparison of changes between first and second flights. SRL-2 was activated on flight day one, and around-the-clock observations conducted by astronauts split into two teams. Besides repeating data takes over same locations as on first flight, unusual events also imaged, including erupting volcano in Russia and islands of Japan after earthquake there. Also tested was ability of SRL-2 imaging radars, Spaceborne Imaging Radar-C (SIR-C) and X- band Synthetic Aperture Radar (X-SAR), to discern difference between such human-induced phenomena as an oil spill in the ocean and naturally occurring film. 

STS-52 was a Space Transportation System (NASA Space Shuttle) mission using orbiter Columbia, and launched 22 October 1992.

Primary mission objectives were deployment of the Laser Geodynamic Satellite II (LAGEOS-II) and operation of the U.S. Microgravity Payload-1 (USMP-1). LAGEOS-II, a joint effort between NASA and the Italian Space Agency (ASI), was deployed on day 2 and boosted into an initial elliptical orbit by ASI's Italian Research Interim Stage (IRIS). The spacecraft's apogee kick motor later circularized LAGEOS orbit at its operational altitude of 3,666 miles. The USMP-1, activated on day one, included three experiments mounted on two connected Mission Peculiar Equipment Support Structures (MPESS) mounted in the orbiter's cargo bay. USMP-1 experiments were: Lambda Point Experiment; Matériel Pour L'Etude Des Phénomènes Intéressant La Solidification Sur Et En Orbite (MEPHISTO), sponsored by the French agency Centre National d'Études Spatiales; and Space Acceleration Measurement System (SAMS).

This Eagle Crest version of the STS-52 patch has a blue border that goes all the way around the patch including the red point.

STS-52 was a Space Transportation System (NASA Space Shuttle) mission using orbiter Columbia, and launched 22 October 1992.

Primary mission objectives were deployment of the Laser Geodynamic Satellite II (LAGEOS-II) and operation of the U.S. Microgravity Payload-1 (USMP-1). LAGEOS-II, a joint effort between NASA and the Italian Space Agency (ASI), was deployed on day 2 and boosted into an initial elliptical orbit by ASI's Italian Research Interim Stage (IRIS). The spacecraft's apogee kick motor later circularized LAGEOS orbit at its operational altitude of 3,666 miles. The USMP-1, activated on day one, included three experiments mounted on two connected Mission Peculiar Equipment Support Structures (MPESS) mounted in the orbiter's cargo bay. USMP-1 experiments were: Lambda Point Experiment; Matériel Pour L'Etude Des Phénomènes Intéressant La Solidification Sur Et En Orbite (MEPHISTO), sponsored by the French agency Centre National d'Études Spatiales; and Space Acceleration Measurement System (SAMS).

Modern make, possibly Far Eastern manufacturer, (Taiwan). NOT Eagle Crest Emblem Inc. This patch has a clear shiny plastic coated backing.

STS-52 was a Space Transportation System (NASA Space Shuttle) mission using orbiter Columbia, and launched 22 October 1992.

Primary mission objectives were deployment of the Laser Geodynamic Satellite II (LAGEOS-II) and operation of the U.S. Microgravity Payload-1 (USMP-1). LAGEOS-II, a joint effort between NASA and the Italian Space Agency (ASI), was deployed on day 2 and boosted into an initial elliptical orbit by ASI's Italian Research Interim Stage (IRIS). The spacecraft's apogee kick motor later circularized LAGEOS orbit at its operational altitude of 3,666 miles. The USMP-1, activated on day one, included three experiments mounted on two connected Mission Peculiar Equipment Support Structures (MPESS) mounted in the orbiter's cargo bay. USMP-1 experiments were: Lambda Point Experiment; Matériel Pour L'Etude Des Phénomènes Intéressant La Solidification Sur Et En Orbite (MEPHISTO), sponsored by the French agency Centre National d'Études Spatiales; and Space Acceleration Measurement System (SAMS).

STS-50 (U.S. Microgravity Laboratory 1) was a United States Space Shuttle mission, the 12th mission of the Columbia orbiter. Columbia landed at Kennedy Space Center for the first time ever due to bad weather at Edwards caused by the remnants of Hurricane Darby.
The U.S. Microgravity Laboratory 1 was a spacelab mission, with experiments in material science, fluid physics and biotechnology. It was the first flight of a Space Shuttle with the Extended Duration Orbiter (EDO) hardware, allowing longer flight durations.
Primary payload, U.S. Microgravity Laboratory-1 (USML- 1), made its first flight; featured pressurized Spacelab module. USML-1 first in planned series of flights to advance U.S. microgravity research effort in several disciplines. Experiments conducted were: Crystal Growth Furnace (CGF); Drop Physics Module (DPM); Surface Tension Driven Convection Experiments (STDCE); Zeolite Crystal Growth (ZCG); Protein Crystal Growth (PCG); Glovebox Facility (GBX); Space Acceleration Measurement System (SAMS); Generic Bioprocessing Apparatus (GBA); Astroculture-1 (ASC); Extended Duration Orbiter Medical Project (EDOMP); Solid Surface Combustion Experiment (SSCE).
Secondary experiments were: Investigations into Polymer Membrane Processing (IPMP); Shuttle Amateur Radio Experiment II (SAREX II); and Ultraviolet Plume Instrument (UVPI).

Very similar to the A-B Emblem souvenir version.

STS-50 (U.S. Microgravity Laboratory 1) was a United States Space Shuttle mission, the 12th mission of the Columbia orbiter. Columbia landed at Kennedy Space Center for the first time ever due to bad weather at Edwards caused by the remnants of Hurricane Darby.
The U.S. Microgravity Laboratory 1 was a spacelab mission, with experiments in material science, fluid physics and biotechnology. It was the first flight of a Space Shuttle with the Extended Duration Orbiter (EDO) hardware, allowing longer flight durations.
Primary payload, U.S. Microgravity Laboratory-1 (USML- 1), made its first flight; featured pressurized Spacelab module. USML-1 first in planned series of flights to advance U.S. microgravity research effort in several disciplines. Experiments conducted were: Crystal Growth Furnace (CGF); Drop Physics Module (DPM); Surface Tension Driven Convection Experiments (STDCE); Zeolite Crystal Growth (ZCG); Protein Crystal Growth (PCG); Glovebox Facility (GBX); Space Acceleration Measurement System (SAMS); Generic Bioprocessing Apparatus (GBA); Astroculture-1 (ASC); Extended Duration Orbiter Medical Project (EDOMP); Solid Surface Combustion Experiment (SSCE).
Secondary experiments were: Investigations into Polymer Membrane Processing (IPMP); Shuttle Amateur Radio Experiment II (SAREX II); and Ultraviolet Plume Instrument (UVPI).

Unlike the A-B Emblem version, this patch has a blue border that is stiched all around the border. 

STS-50 (U.S. Microgravity Laboratory 1) was a United States Space Shuttle mission, the 12th mission of the Columbia orbiter. Columbia landed at Kennedy Space Center for the first time ever due to bad weather at Edwards caused by the remnants of Hurricane Darby.
The U.S. Microgravity Laboratory 1 was a spacelab mission, with experiments in material science, fluid physics and biotechnology. It was the first flight of a Space Shuttle with the Extended Duration Orbiter (EDO) hardware, allowing longer flight durations.
Primary payload, U.S. Microgravity Laboratory-1 (USML- 1), made its first flight; featured pressurized Spacelab module. USML-1 first in planned series of flights to advance U.S. microgravity research effort in several disciplines. Experiments conducted were: Crystal Growth Furnace (CGF); Drop Physics Module (DPM); Surface Tension Driven Convection Experiments (STDCE); Zeolite Crystal Growth (ZCG); Protein Crystal Growth (PCG); Glovebox Facility (GBX); Space Acceleration Measurement System (SAMS); Generic Bioprocessing Apparatus (GBA); Astroculture-1 (ASC); Extended Duration Orbiter Medical Project (EDOMP); Solid Surface Combustion Experiment (SSCE).
Secondary experiments were: Investigations into Polymer Membrane Processing (IPMP); Shuttle Amateur Radio Experiment II (SAREX II); and Ultraviolet Plume Instrument (UVPI).

The white backing of the STS-50 patch might be one of the most distinctive of all of A-B Emblem's shuttle patches.

STS-43, the ninth mission for Space Shuttle Atlantis, was a nine-day mission whose primary goal was launching the fourth Tracking and Data Relay Satellite, TDRS-E. The flight also tested an advanced heatpipe radiator for potential use on the then-future space station and conducted a variety of medical and materials science investigations.

The primary payload, Tracking and Data Relay Satellite-5 (TDRS-5 or TDRS-E), attached to an Inertial Upper Stage (IUS), was deployed about six hours into flight, and the IUS propelled the satellite into geosynchronous orbit. TDRS-5 became the fourth member of the orbiting TDRS cluster. Secondary payloads were Space Station Heat Pipe Advanced Radiator Element II (SHARE II); Shuttle Solar Backscatter Ultra-Violet (SSBUV) instrument; Tank Pressure Control Equipment (TPCE) and Optical Communications Through Windows (OCTW). Other experiments included Auroral Photography Experiment (APE-B) Protein Crystal Growth Ill (PCG Ill); Bioserve / Instrumentation Technology Associates Materials Dispersion Apparatus (BIMDA); Investigations Into Polymer Membrane Processing (IPMP); Space Acceleration Measurement System (SAMS); Solid Surface Combustion Experiment (SSCE); Ultraviolet Plume imager (UVPI); and the Air Force Maui Optical Site (AMOS) experiment.

This version has modern embroidery.

STS-43, the ninth mission for Space Shuttle Atlantis, was a nine-day mission whose primary goal was launching the fourth Tracking and Data Relay Satellite, TDRS-E. The flight also tested an advanced heatpipe radiator for potential use on the then-future space station and conducted a variety of medical and materials science investigations.

The primary payload, Tracking and Data Relay Satellite-5 (TDRS-5 or TDRS-E), attached to an Inertial Upper Stage (IUS), was deployed about six hours into flight, and the IUS propelled the satellite into geosynchronous orbit. TDRS-5 became the fourth member of the orbiting TDRS cluster. Secondary payloads were Space Station Heat Pipe Advanced Radiator Element II (SHARE II); Shuttle Solar Backscatter Ultra-Violet (SSBUV) instrument; Tank Pressure Control Equipment (TPCE) and Optical Communications Through Windows (OCTW). Other experiments included Auroral Photography Experiment (APE-B) Protein Crystal Growth Ill (PCG Ill); Bioserve / Instrumentation Technology Associates Materials Dispersion Apparatus (BIMDA); Investigations Into Polymer Membrane Processing (IPMP); Space Acceleration Measurement System (SAMS); Solid Surface Combustion Experiment (SSCE); Ultraviolet Plume imager (UVPI); and the Air Force Maui Optical Site (AMOS) experiment.

STS-34 was a NASA Space Shuttle mission using the Atlantis orbiter. It was the 31st shuttle mission overall, and the fifth flight for Atlantis. STS-34 launched from Kennedy Space Center, Florida, on 18 October 1989, and landed at Edwards Air Force Base, California, on 23 October. During the mission, the Jupiter-bound Galileo probe was deployed into space.

This 3" version has "USA" on the wing.

STS-34 was a NASA Space Shuttle mission using the Atlantis orbiter. It was the 31st shuttle mission overall, and the fifth flight for Atlantis. STS-34 launched from Kennedy Space Center, Florida, on 18 October 1989, and landed at Edwards Air Force Base, California, on 23 October. During the mission, the Jupiter-bound Galileo probe was deployed into space.

The real tell on this particular patch is the size of the "USA" on the wing. This has a very large bold "USA".

STS-34 was a NASA Space Shuttle mission using the Atlantis orbiter. It was the 31st shuttle mission overall, and the fifth flight for Atlantis. STS-34 launched from Kennedy Space Center, Florida, on 18 October 1989, and landed at Edwards Air Force Base, California, on 23 October. During the mission, the Jupiter-bound Galileo probe was deployed into space.

The real tell on this particular patch has no "USA" on the wing and a twill background.

STS-34 was a NASA Space Shuttle mission using the Atlantis orbiter. It was the 31st shuttle mission overall, and the fifth flight for Atlantis. STS-34 launched from Kennedy Space Center, Florida, on 18 October 1989, and landed at Edwards Air Force Base, California, on 23 October. During the mission, the Jupiter-bound Galileo probe was deployed into space.

The real tell on this particular patch is the size of the "USA" on the wing. Swissartex version has a medium sized "USA" compared to the A-B Emblem version.

STS-34 was a NASA Space Shuttle mission using the Atlantis orbiter. It was the 31st shuttle mission overall, and the fifth flight for Atlantis. STS-34 launched from Kennedy Space Center, Florida, on 18 October 1989, and landed at Edwards Air Force Base, California, on 23 October. During the mission, the Jupiter-bound Galileo probe was deployed into space.

The real tell on this particular patch is the size of the "USA" on the wing. A-B Emblem has a small "USA".

Launched September 18,1991, landed September 26,1991

Primary payload, the Upper Atmosphere Research Satellite (UARS), deployed on the third day of the
mission. During its planned 18-month mission, the 14,500-pound observatory will make the most
extensive study ever conducted of the Earth's troposphere, the upper level of the planet's envelope of life
sustaining gases which also include the protective ozone layer.