Awning window Operator

A professional from Hawaii says:
trying to find the best replacement for this operator

it looks like part #39-083

but the overall of existing is 21.5"

part #39-070 overall length would work better, but the crank mechanism looks incorrect.

please advise

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Tom from SWISCO responded:

I don't believe that our 39-070 will work for you, the base is just too different. You mention that the overall size of your operator is 21-1/2", but that's the same as our 39-083. Your post implies that yours is different. Can you specify exactly what size you need? Could our 39-015 be a better choice?

A professional from Hawaii says:
great i think that the 39-015 will actually work!

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Tom from SWISCO responded:

Sounds great!

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