Blue Seal © 1931 Watling Manufacturing Co.
Dime Play. Twin Jack Pot.
Style 80
Selling price by years :
1931 - $75
1932 - $75
1933 - $59
1934 - $55
Also released as a Nickel Play model called "Blue Seal [Twin Jack Pot] [Style 70]", and a Quarter Play model called "Blue Seal [Twin Jack Pot] [Style 90]".
Collector's Treasury of Antique Slot Machines from Contemporary Advertising - Peter Bach - Page 63, 68, 83 & 122