O.K. Gum Trade and Check Vending Machine © 1920 Silver King Novelty Co.
No blanks. A 5-cent package of gum was vended for each nickel played.
No. 101
Silver King O.K. Gum Trade and Check Vending Machine was sold $150 in 1920.
Slot's picture.
Collector's Treasury of Antique Slot Machines from Contemporary Advertising - Peter Bach - Page 11