No markings on pivot shoe

Unfortunately, the manufacturer of your pivot shoe has gone out of business. We suggest the 15-173 as a substitute. It is slightly thicker than 1/2" (.546" to be exact), but it may still work. I would just like to see your pivot bar and balance to make sure they are compatible.

Thank you! After looking this over, I believe the 15-173 should be compatible with your old pivot bar, yes.