Crank is from a Silverline window. Marked inside with "patent no D-198202U Bottom holes 1-1/8" apart. Bottom hole to top hole 5-3/16"
Bob from SWISCO responded:
August 27, 2020
The older Silverline brand of awning operators is no longer made, but our 39-025 and 39-026 might work for you. You'll need to compare all the dimensions, including the size of the hole at the end of the link arm, to confirm.