Share this

Last Updated: November 24, 2020

Play 21 Bell Slot Machine for Free


About This Slot

Following is a respresentation of the 21 Bell Slot Machine, © 1973. A mathematical analysis of this slot can be found in my slot machine appendix 5.

My source for the design of this game is Brett Niver of Kent State University. My brother found the design as part of one of the professor’s homework assignments. Professor Niver credits John Scarne, Scarne’s New Complete Guide to Gambling, New York: Simon and Schuster, 1974, as the original source.

More on Slots

I have lots more information about slot machines and how they work in my slot machine section.

Questions and Answers

See questions I’ve answered about slot machines from my Ask the Wizard columns.

Online Slots BonusesView All

Rank Casino Name Bonus % Wager Cash Code   Casino Name Bonus info  
PlayCroco Casino 🧙 AU$20 - WODDS20 Play
PlayCroco Casino Bonus 🧙AU$20 Play
Wager -
Code WODDS20
Rich Palms Casino 🧙 $50 - LCB50 Play
Rich Palms Casino Bonus 🧙$50 Play
Wager -
Code LCB50
Thisisvegas Casino 🧙 125 - Play
Thisisvegas Casino Bonus 🧙125 Play
Wager -
CryptoSlots Casino 🧙 $500 177% 35xB MATCH177LCBN Play
CryptoSlots Casino Bonus 🧙$500 Play
% 177%
Wager 35xB
DaVinci's Gold Casino 🧙 25 - Play
DaVinci's Gold Casino Bonus 🧙25 Play
Wager -