Skylab Program Patch Variations

I noticed that there was a clothed-backed Skylab program patch that differed from the standard A-B Emblem issue in a vew ways:

• Stiitching of the ATM truss
• Tighter stitching on solar panels
• Smaller "United States of America"

I assumed it was an A-B Emblem variation because the embroidery of the clouds are virtually identical, a feat that would be nearly impossible to accomplish, I just didn't have any way to prove it. I finally found one in the same official KSC packaging. I have never found a version that wasn't cloth backed, while the common version appears in both cloth and iron-on backing.