Rol-A-Top [Diamond Bell]

1. Rol-A-Tor (1935)
1. Rol-A-Tor [Ball Gum Vender] (1935)
1. Rol-A-Tor [Front Vender] (1935)
1. Rol-A-Tor [Mint Vender] (1935)
1. Rol-A-Tor [O.K. Vender] (1935)
1. Rol-A-Tor [Gold Award] (1935)
1. Rol-A-Tor [Gold Award] [Ball Gum Vender] (1935)
1. Rol-A-Tor [Gold Award] [Front Vender] (1935)
1. Rol-A-Tor [Gold Award] [O.K. Vender] (1935)
1. Rol-A-Tor [Silent Salesman] (1935)
2. Rol-A-Top (1935)
2. Skill Controlled Rol-A-Top [Front Vender] (1935)
3. Rol-A-Top [Bird of Paradise] (1936)
4. Rol-A-Top [Baseball-Reel] (1937)
5. Rol-A-Top [Cherry Bell] (1937)
5. Rol-A-Top [Cherry Bell Front Vender] (1937)
5. Rol-A-Top [Cherry Bell] [5-Pull model] (1938)
6. Rol-A-Top [Improved Cherry Bell] (1938)
7. Rol-A-Top [5-Pull Front Vender] (1938)
7. Rol-A-Top [5-Pull Gold Award Vender] (1938)
8. Rol-A-Top [Future Play] (1938)
8. Rol-A-Top [Future Play Front Vender] (1938)
9. Rol-A-Top [Diamond Bell] (1938)
9. Rol-A-Top [Diamond Bell Front Vender] (1938)
10. Rol-A-Top [Hand Loaded Twin Jack Pot] (1939)
11. Rol-A-Top [Castle Front] (1948)

Slot's picture.
Collector's Treasury of Antique Slot Machines from Contemporary Advertising - Peter Bach - Page 204 & 205
Collector's Guide to Vintage Coin Machines - Richard M. Bueschel - Page 52
The Coin Machine Journal - January 1940 issue
Loose Change Blue Book for Slot Machines [4th Edition]