Superior Operator's Bell [Naked Lady] © 1926 Caille Bros.
Patent Applied for Slug-Proof Coin Detector.
Machine's picture.
Collector's Treasury of Antique Slot Machines from Contemporary Advertising - Peter Bach - Page 15
For Amusement Only - Thomas Gustwiller - Taylor Printing - 1995 - Page 28
Loose Change Blue Book for Slot Machines [4th Edition]