The 1977 O-Pee-Chee set represents a change in philosophy
for the Canadian company. The design of the set is still identical to the Topps
set of the same year, but the number of cards was reduced to 264 with more
emphasis on players from the two Canadian teams. The backs are printed in both
French and English and state "O-Pee-Chee Printed in Canada."
About 1/3 of the photos in the OPC set differ from the corresponding Topps
cards either with entirely different photos, airbrushed uniform changes, the
removal of All-Star and Rookie Team designations, or significant photo cropping
variations. Cards measure the standard 2-1/2" x 3-1/2". - 2007 Standard Catalog of Baseball
Cards, 16th Edition.