Pivot shoe lock

A home owner from Buffalo NY says:
Can you help me find a replacement for this?
There are no markings on the window that I can find. The psl on the other side is broken to bits.

Thanks!
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Bob from SWISCO responded:

Thanks for posting. This exact pivot shoe is no longer made, but you should be able to replace it with the 15-177. This shoe (and your old one) works with Series 152 Coil Balances. Let me know if you have further questions. 

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