The part (looking at the front) measures 1/4" wide by 1 3/16" long.
The slot/hole along the window edge is 2/16" wide by 1" long.
There are no identifying numbers or markings.
I have tan Custom Gard windows.
Dave Sr. from SWISCO responded:
June 11, 2014
Thanks for posting. Take a look at our 26-106 and let me know if you think this would be a good match.