Crank operator

A handy person from Minnesota says:
Looking for a single arm operator, 11.5 inches, right-handed, rear mount, white, steel roller. Number stamped on arm is 40068.
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Emily from SWISCO responded:

Hi there!

Start by comparing your dimensions to our 39-022 and 39-023 operators and see if these match up to your original assembly. 

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Anatomy of a casement window
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