@mcdefjef clued me in that there was an NOS manual on eBay and I bought it.
It's for "model 100" and does not reference any other models.
It describes my unit...with power...light, chimes, buzzer, mercury switch. There is even a very short schematic diagram of the entire game which fits on one page.
I conclude from this that the original machines were probably model 100 and electrified and later machines were simplified. I have seen the same type of thing with ABT games becoming simpler over time.
Here are a couple pictures from the manual.
It's for "model 100" and does not reference any other models.
It describes my unit...with power...light, chimes, buzzer, mercury switch. There is even a very short schematic diagram of the entire game which fits on one page.
I conclude from this that the original machines were probably model 100 and electrified and later machines were simplified. I have seen the same type of thing with ABT games becoming simpler over time.
Here are a couple pictures from the manual.


