I met a guy named Eric who was an arm wrestler, and turns out he also has written a great overview of arm wrestling arcade machines
ARMWRESTLING AMUSEMENT DEVICES: THE BEST MACHINES IN THE ARCADE
https://www.thearmwrestlingarchives.com/armwrestling-amusement-devices.html
also thought this might interest some of you:
ARMWRESTLING MATCHES IN PROFESSIONAL WRESTLING
https://www.thearmwrestlingarchives.com/armwrestling-matches-in-professional-wrestling.html