Most visitors online was 4107 , on 14 Jan 2023
Hi terofpa!
The best way to help You with Your question is if You post a clear picture of the whole backplate of Your clock,best with removed suspension spring guard (which covers the Susp.spring)Then we can determin the exact number of backplate in our reference book,the "400 Day Clock Repair Guide"by Charles Terwilliger and tell You wich SS is needed.Looking foreward to the pic!
Burkhard