In the early O-Pee-Chee cards...What are the scarce color variations of the same cards. Has anyone looked into what is a possible short print.

Personally, in higher grades of A-B, I have found the blue variation the most scarce, then red and green about equal, with orange the most 'common'. I have not seen any series B blue variations above NM.

Here is a rarely seen colour variation of the 1935 OPC, its sort of a indian red.