casement window operator for TR100

A quick learner from pittsburgh, pa says:
I have 2 sized of casement windows that I need to replace the crank operator on. One unit has 4102 stamped on the arm. I need 3 right hand and 1 left hand units. They also have truth stamped on them

thanks for the help
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Tom from SWISCO responded:
Please look at our 39-253R dual arm operator and compare it to yours. I think this could be what you're looking for.
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