The Game Of Radio

I finally acquired a deck of cards from the famous Game Of Radio set. It was produced by the Radio games Company in Peoria, IL starting around 1924. The deck consists of 51 cards.The object of the game is to get 40 points. You can get 10 points by spelling the word R-A-D-I-O. You also can earn 5 points for each for spelling the three or four letter call signs from a list of 20 stations included on the instruction sheet. The below stations all have cards:

WGR - Buffalo, NY - 319 meters
KDKA - Pittsburgh, PA - 326 meters
WSB - Atlanta, GA - 429 meters
WMC - Memphis, TN - 500 meters
WGN - Chicago, IL - 370 meters
WOO - Philadelphia, PA - 509 meters
KSD - St. Louis, MO - 546 meters
WFAA - Dallas, TX - 476 meters
KPO - San Francisco, CA - 423 meters
WGY - Schenectady, NY - 380 meters
WTAM - Cleveland, OH - 390 meters
WLAG - Minneapolis, MN - 417 meters
WRC - Washington D.C. - 469 meters
KFI - Los Angeles, CA - 469 meters
WEAF - New York, NY - 492 meters
WWJ - Detroit, MI - 517 meters
WDAF - Kansas City, MO - 411 meters

Additionally in the instructions you can also spell CKAC - Montreal, Quebec; KFOA - Seattle, WA; and WOC - Davenport, IA. the instructions leave lines 18, 19 and 20 blank, presumably for future stations call signs which can be spelled with the available letters. Jeff Miller maintains a webpage here which lists all active call signs from 1924 giving you an idea of how limited this list really is.  More here and here.