Spiral balance pivot bar

A home owner from Burlington, ct says:
Windows were purchased from Stevenson millworker in Ct. They are no longer in business. Part is 2-1/2 inch long 5/16 wide with hole 1" from the end . The broken cast piece goes in the top window and the other bar goes in the bottom window.
User submitted image of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. See our 26-412 and 26-040, these appear to match the parts in your picture. I would just recommend carefully going over our dimensions to confirm these match.
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