casement window operator

A handy person from Waterloo, Ontario says:
I need to replace my operator. It looks just like the 39-216 unit on your website. The number under the arm is 40574.
Are they the same?
User submitted photo of a casement window operator.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting! I agree, your hardware looks very similar to our 39-216 Single Arm Window Crank. I cannot confirm if they're the same, though, without knowing your dimensions. Compare the measurements and let us know if they differ in any way.
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