Window opener on a Windsor casement window.

Home Owner from Minneapolis, MN
Sep 11, 2022 10:59 am
It is Trust brand 31538 with a B on the short arm.
1 user uploaded image
3 Replies

Home Owner from Minneapolis, MN
Sep 12, 2022 2:53 pm
After looking at other windows, I also have "20810" and "20810A", are these all the same?

Tom from SWISCO
Sep 14, 2022 2:02 pm


Thanks for posting. It's tough to tell without seeing the entire operator, but the design of the short arm in your photo reminds me of the one that comes with our 39-031 and 39-032. My recommendation to you is to review the design and arm sizes for these products to verify that they match your original. Don't worry about the stamps printed on the operator for now. You just want to focus on design and size.

Dimensions for 39-031
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