Blue Seal © 1931 Watling Mfg. Co.
Dime Play. Twin Jack Pot. Front Vender.
Style 82
Selling price by years :
1931 - $100
1931 - $90
1932 - $80
1933 - $70
1934 - $60
Also released as a Nickel Play model called "Blue Seal [Twin Jack Pot] [Front Vender] [Style 72]", and as a Quarter Play model called "Blue Seal [Twin Jack Pot] [Front Vender] [Style 92]".
Collector's Treasury of Antique Slot Machines from Contemporary Advertising - Peter Bach - Page 63, 64, 83 & 122