[Sean]

It looks like your turntable has had the post-war retrofit for the motor and drive installed.  The phono in my 42-1015 is the same way.  I bought a bunch of square cross-section O-rings from McMaster-Carr to replace the rubber on the drive wheel.  PM me your mailing address and I'll drop one in the mail for you gratis.  I only needed one but had to buy something like 10 of them.

I also did some modifications to the mounting of that drive wheel in my unit.  There was a lot of slop in the way the bracket that holds the wheel was mounted to the base which caused the wheel to wobble while the platter was spinning.  There was a shoulder bushing that fit into the slot of the bracket and a mounting screw when through this bushing and into the base.  The bushing was a little too long so I filed it down and made sure there was a washer on the top of the bracket between it and the nut that held everything together.  I checked that there was minimal wobble but that the whole assembly was not so tight as to prevent the bushing from sliding in the slot on the bracket.  A little bit of grease on those surfaces also helps.