Bob from SWISCO responded:
March 3, 2024
Thanks for posting. I'm sure we can help, but I need to see the attachment on the other end of the balance to fully identify it. That stamp is not an identifier; it just tells us the balance's strength. As for the Top Sash Guide, let me know if the 18-009 matches what you have, or if it differs in any way. Detail of 18-009
Side view of 18-009
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