I've got a couple of 30's game pages on my web site.
1939 Bally Champion
Bally Champion 3 sm (resized).jpg
https://www.funwithpinball.com/resources/1939-Bally-Champion
and a few details about '34 Rockola World's Series
_MG_5723 sm (resized).jpg
https://www.funwithpinball.com/resources/Worlds-Series
/Mark