Apollo-Soyuz Test Project - 4" - Unknown maker

This patch at first glance appears to be very similar to the A-B Emblem souvenir version, however, it is slightly different, notably: narrower gap between "Slayton" and "Leonov". The gold border area is a horizontal stitching rather than a radial stitch. The gold stars on the red field are embroidered rather than just unstitched areass in the red. The back is vacuum sealed and the embroidery style is the classic rather than modern type, so it is not a newer reproduction.