1970 ish Andersen casement operator handle

A quick learner from North Carolina says:
Saw a similar handle on your site, but the date range is a little later vintage (1974 +). Do you know if they will work on an earlier version?
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Bob from SWISCO responded:

Measure the diameter of the gear bore the handle fits onto. Is it 3/8"? If so, then the 39-286 should work for your Andersen operator.

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