In 1972, a set of postcards were printed by Pro Star Promotions out of Canada. They aren't especially attractive, but do have a nice selection of Orioles. The set includes a total of 37 postcards with the checklist card. Being printed in Canada, the set is heavy on Montreal Expos players. The are 12 AL Stars, 12 NL Stars and 12 Expos. The backs are blank. I assume they weren't licensed since there aren't any team logos. Not too hard to find.
4 out of the 12 AL Stars are Orioles. The checklist also indicated a set of posters were available.
Dave McNally, Boog Powell, Merv Rettenmund and Brooks Robinson
1972 Pro Star Promotions 01.jpg 1972 Pro Star Promotions 02 - Copy.jpg