Custom neoprene rubber sheets
This is 12" x 24", about $85 and you can cut to shape. More on this website if you want a different durometer (hardness) or material. Like the other comment above about putting a couple layers of linen between rubber and floor to allow moisture to get out...
Same era Brunswick Balke-Collander.
I've got a same era Brunswick that I'm working on restoring. Pinned 1.5" slates. I'm getting lots of information from this website forum and plan to do (most or all of) the work myself. I'll be glad to send you information on my table if you need it for...
Im doing some investigation on same era brunswick balke-collander pfister. Slates are pinned, 1.5". Similar serial number, 5 digits, stamped.
Mine has pocket number stamps also. Ive gotten lots of info digging through old threads on AZB.