They were produced by a Massachusetts-based company called Gum Products, Inc
There are 150 player pictures spread out over 75 cards. Cards numbered 1-79 and 101-150 are arranged horizontally and feature portrait shots, while 80-100 are arranged vertically with full-body action shots.
Cards that have been cut in half to form "singles" have a greatly reduced value. The player on the left has an odd number and the other player has an even number.
Cubs checklist1941 Double Play #1 Larry French-Vance Page
1941 Double Play #3 Billy Herman-Stan Hack
1941 Double Play #97 Stan Hack-Bob Klinger
1941 Double Play #101 Dom Dallesandro-Augie Galanw
1941 Double Play #103 Bill Lee-Phil Cavarretta