The base cracked on the window and I need a new piece. The brand is truth.
Tom from SWISCO responded:
April 13, 2018
This looks very similar to our 39-221 operator. The only difference is that ours doesn't have a nesting handle and cover. If you think the 39-221 is a match, see our 39-205 folding handle.
A home owner from SF, CA says:
April 14, 2018
I found this crank on you website: TRUTH FOLDING HANDLE WITH COVER
Product Code: 39-375