A handy person says:
July 15, 2015
I need replacement for 3 broken Multi-Point Lock actuator. It has no manufacturer name or part number, but other hardware on the casement window says ROTO or TRUTH.
Dave from SWISCO responded:
July 16, 2015
Take a look at the newer style 38-139 lock. I believe it has the same size fork as the one in your photo, but triple check just to be sure.