A company called Big League Collectibles put out four different sets between 1982 and 1985. I find the timing interesting because this was just before baseball cards really took off. Donruss and Fleer were just getting started and the market wasn't flooded yet.
I couldn't find anythings on the Big League Collectibles company. I have not idea who ran the company or where it was located. All I know is that they released four different sets.
The 1982 set was called Diamond Classics. It consists of 55 players and a checklist. As you might surmise from the set's name, none of the players were active. In fact, most were from the 20's through the 50's..
The cards are on a heavier stock of cardboard and have a painted portrait of the player. The width of the cards is the standard 2½" but the height is ¼" taller, 3¾".
The set was limited to a run of 10,000 and each set included a numbered header card.
Just two of the 55 Diamond Classics are Cubs.
On the left if Kiki Cuyler and Hack Wilson is on the right.