Blue Seal [Jack Pot Front Vender] [Style 52] © 1930 Watling Mfg. Co.
Quarter Play.
Blue Seal [Jack Pot Front Vender] [Style 52] was sold $90 at it's release. The new price was $80 in 1931.
Also released as a Nickel Play model called "Blue Seal [Jack Pot Front Vender] [Style 42]".
Collector's Treasury of Antique Slot Machines from Contemporary Advertising - Peter Bach - Page 47 & 62