Ive got a sample game of Genco's 1947 Triple Action... the only real differences are that 1.. it has never worked as it was one of the line to troubleshoot... 2..it has about 100 plays on it and 3.. the credit wheel is a blank. no white paint or numbers. Its an iconic game, not sure if it being a proto adds value or how much, but to an EM collector its a true prize to have and for a museum??... Its perfect