Here are my photos of the casement assembly with working crank. I need a compatible replacement for cranks that have had their internal gears stripped.
Tom from SWISCO responded:
June 23, 2020
It's tough to tell what your crank operator is while it's still installed, but the style of the base resembles that of our 39-001 and 39-002 . Could these be what you need? Look over the pictures and dimensions we show on their store page and let me know what you think.