garden window crank knob stripped

A quick learner from Martinez CA says:
May 31, 2021
no markings, no nothing. gear on lifting arm is stripped. arm is one single piece that curves back with a gear on the end. threads on knob are okay. window is at top of garden window box.
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Emily from SWISCO responded:
June 3, 2021

Hi there!

Could you remove your window operator and show us the arm? That will help us narrow down our options.

Thank you! 
A quick learner from Ventura CA says:
April 16, 2023
On 5/31/2021, this was posted with 4 pictures. "no markings, no nothing. gear on lifting arm is stripped. arm is one single piece that curves back with a gear on the end. threads on knob are okay. window is at top of garden window box."

I have the same configuration and need the replacement gear arm for my window. Do you have the part at SWISCO?
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Dave Sr. from SWISCO responded:
April 19, 2023

Have a look at the 39-414 operator used for top venting windows. This is normally used for top venting windows in trailers and RVs. Review the specifications and see how they match up with yours. 
Vent Operator, 6" Arm
Vent Operator, 6" Arm
39-414
$17.20
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