Waterville Window Extruded Vinyl Window based out of Waterville, ME. They went out of business in 2009. This piece sits in the bottom of the window and the pin sits in the balance.
Casey from SWISCO responded:
July 17, 2020
Hello,
We don't carry an exact replacement for this pivot bar but take a look at our 26-379 and see how the dimensions compare to yours. Thanks for posting!