The Official Sweepstakes © 1933 Rock-ola.
Also released as "The Official Sweepstakes [Ball Gum Front]".
Patent 90,897 - OCT. 17, 1933 by D.C. Rocola
Machine's picture.
100 ans de Machines à Sous - Jean Lemaitre - Éditions Alternatives - 1997 - Page 164
For Amusement Only - Thomas Gustwiller - Taylor Printing - 1995 - Page 99
The Coin Machine Journal - January 1940 issue