I've put together a comprehensive restoration log for a 1934 Rock-Ola World's Series mechanical pinball machine. For those unfamiliar this is a remarkable mechanical baseball game that keeps track of balls, strikes, outs, base runners and runs scored without electricity. Included in the log are hundreds of photos and videos documenting how the game works, inside and out.
https://www.funwithpinball.com/resources/Worlds-Series
I hope you enjoy it.
/Mark