replace twist handle with crank handle

A home owner from Sammamish, WA says:
Hello,

I would like to replace the twist handle of the window with a crank handle. Can you identify which part I need? There are no screws or identifying numbers on the current twist handle. A "+" sign is visible.

Thank you,
-Jane
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Casey from SWISCO responded:

Hello,

Take a look at the 39-114L or 39-205 folding handle, which both have an 11/32" diameter opening used to attach the handle to the operator base. I would recommend removing the piece of your t-crank that is still attached to the operator base to confirm that your original handle is the same size. Thank you! 

Alternate view of the gear hole
Alternate view of the gear hole

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