1960s O-Pee-Chee

In 1965, the O-Pee-Chee produced a licensed version of the American Topps set of that year, but it only issued cards 1- 283, instead of the full 598 card Topps set. They continued to produce smaller versions of the Topps sets for the rest of the decade. The primary difference with the O-Pee-Chee sets is the 'Printed in Canada' statement on the reverse. The copyright line shows T.C.G, and did so until 1972 when it changed to O.P.C. The 1969 O-Pee-Chee set included the company's logo on the reverse and used a dark red ink as opposed to the pink ink on the Topps cards.

In the 1970s, O-Pee-Chee produced a licensed version of the American Topps sets throughout the decade. The Canadian printed O-Pee-Chee cards tended to be printed on lighter grey cardstock and often included traded lines on the front of the cards. In 1970, due to Canadian law, the cards were modified to include both French and English text in which case T.C.G was replaced by O.P.C. in the copyright line. The first four series of the 1971 set(1-523) featured French and English card backs, while the 5th and 6th series reverted to the English-only back of their Topps counterpart. The 1971 set also had several cards unique to the Canadian issue, including cards with trade lines on the front, and extra Expo player cards that resulted in the O Pee Chee set substituting Ron Hunt for Topps' #161 Coin Checklist,Claude Raymond for Topps' #202 Reds Celebrate, and Rusty Staub for Topps' White Sox Team Card. In 1977 different photos were used on some of the cards. Other variations include yellow backs in 1971 and 1974 rather than green used by Topps. From 1973 until 1975, the amount of cards in both the Topps and O-Pee-Chee sets were identical in size.