Casement Window Operators

A home owner from Parker, CO says:

I'm trying to identify the type of casement window operators to use to replace these. Can you assist given the attached pictures?


User submitted photos of a window operator.
Profile picture of Paul
Paul from SWISCO responded:
How long are these arms? It's hard to tell from your images, since you only have a tape measurer held next to the part. We also have a very specific way we measure our arms. Start by looking at our 39-013 and 39-014, as well as our 39-027E and 39-028E and let me know which is closer.
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