norco casement window

A home owner from MT says:
I have a Norco casement window mechanism that needs replacing. This is a right hand opening (crank on left side of the window) window. The long arm has EntryGard TRUTH stamped on the top side and 40754 on the other. The short articulated arms have 20755 on the top side, where the end attaches to the window, and 31538A on the bottom, on the arm attached to the gear.
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Bob from SWISCO responded:

Thanks for writing in. See our 39-155 and 39-156 to start. Go over the dimensions and let me know if you think this is what you need.

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