Window Crank

A home owner from Falmouth MA says:
on pic 9349and 9351 you can see the piece is missing.
on pic 9361 (on another window) you can see the piece is there.
Can you tell me what part number I need? I think it is part number 39-520 (13 and 1/2" Operator Track)
Thumbnail of the uploaded file named IMG_9361.jpg
Thumbnail of the uploaded file named IMG_9351.jpg
Thumbnail of the uploaded file named IMG_9350.jpg
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Casey from SWISCO responded:

Hello,

You may be able to use our 39-533 track, but you'll most likely need to replace your operator since your operator doesn't appear to be manufactured anymore. Take a look at our customer discussion here for more information on replacing your operator with either our 39-027E or 39-028E, which work with the 39-533 track. Thank you!

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