Replacement Awning Operators Left and Right

A home owner from Atlanta, Georgia says:
Need replacement left and right awning window crank operators. Cannot locate brand on device but found a patent number (2732726). Please advise.
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Bob from SWISCO responded:

Thanks for posting. This is a very old style operator that isn't made anymore. A very similar outdated operator with the same patent code came up once before, and in that case we posited that the 39-256B and 39-257B could be used as substitutes. But it looks like your bottom tab has three mounting holes instead of two, which frankly I've never seen before. Without seeing the link arm in the back, I don't know if this set could work for you, but it may be our best bet. Take a look, carefully compare to an undamaged version of this operator, and see what you think.

How to identify casement and awning operators
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