need casement window operator for Andersen 7073A L

A quick learner from 02359 says:
replacement operator needed for Right side of pair of windows, Arm has stamp showing ANDERSEN 51 7073A L, I Believe these are original to our 1960's vintage house. Am considering updating the windows, this may be the reason to do so now, rather than later...
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Bob from SWISCO responded:

I can't be certain without pictures, but I believe this operator is akin to the one in this old discussion here. As that old discussion explains, you may be able to use our 39-365 as a replacement. Look it over and see what you think. 

39-365 : 9-1/2
9-1/2" Single Arm Operator, SS Roller
Anatomy of a casement window
Anatomy of a casement window
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