Help ID Window Crank part

A quick learner from Oakland says:
US Pat, 4505601
Pat Canada, 1986
UK Pat, 2135397

Above are all of the Pat # i can find in the unit. The locking cylinder that holds the swivaling arm and crank broke (you can see in the picture). It seemed similar enough to this post, my unit has four screws that holds it in place.

Please help!
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I can't quite tell what you have based on these pictures, but see our 39-138, 39-141, and 39-406 operators. You will have to remove yours from the window entirely to make sure everything matches up.
A quick learner from Oakland says:
Thank you! These should be it, the only difference is the length of the arm it seems. I'll measure it and take it from there.

One last question. Are all of the crank handles I choose to go with the same fitting? I want to go with a shorter handle, but want to make sure it will fit. I don't see diameter specifications of the crank handle's slot
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Yes, all of the cranks I suggested use handles that have an 11/32" spline. You may want to consider our 39-205 since it folds.
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