JCM 12b: 1960 Marusan Simple Back

JCM 12b: 1960 Marusan Simple Blue Back is another of a number of sets with similar backs. There are 40 cards, 1 13/16" x 3". I usually start with looking for back #s (which are consistent, but there are many of the same number) and match to the player uniform # on the front. Or just read the player name on the front, if it's not accidentally printed black on black.