The following are photos of commemorative stamps in my collection, assembled by Ginger Wentrcek of the Brazos Valley Astronomy Club from photos which I submitted.
http://brazosvalleyastronomyclub.org/space-program-stamp-collection.html
Interestingly, I traveled to the Soviet Union just after the Apollo Soyuz mission and there obtained the Soviet version of the stamp. At the present time, that stamp is misplaced, but if located I will post it here.