Need new parts for 40 yr old vent

A quick learner from Pueblo Colorado says:
Our local glass man thought it might be part number 39379. Could not get a ladder to fit in to get up to see part number. So sending you picture of the fixture and crank head.
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Casey from SWISCO responded:

Hello,

Your skylight operator certainly resembles our 39-379 but you would need to compare the specifications shown on our product page to be sure if it's a match. Thanks for posting! 

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