Roto casement hinge piece

A handy person from Dartmouth, Mass. says:
This is a plastic hinge piece that fits under a casement window and links to the extender arms. There are black pins on either side that are broken off--I've put one of them next to the piece in the close up. The piece is made by Roto, and there is a number on the back that looks like OP05 1007.
Roto hinge
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Tom from SWISCO responded:
Take a look at our 39-340, I think this could possibly work for you.
A home owner from New York says:
Yes that's it that needs replacement. Thank you.
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