Dave Sr. from SWISCO responded:
November 21, 2012
Thanks for posting! Now that I'm looking at your gasket, I don't think it will be important. You should be fine with just the operator, as long as the window opens and closes. To be perfectly honest, I don't even know if Truth still makes this gasket, or who makes it for them. The closes thing we have is our 39-303, however, if you think you may be able to use it as a replacement.
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