This is a ball lifter from 1957 Wms Hi-Hand.
There is a rubber button on the piece, but nothing bumps up against it. Either I’m missing a part or... I dunno... what is it there for?
Also, there was an old flat piece of rubber in the cabinet that looks like it might have belonged on the part of the ball lifter that raised the ball. Did ball lifers come with a rubber mitt on them to protect the balls?
DAF34431-D907-48BC-87A7-952C32A2AD54 (resized).jpeg