A handy person from Salt Lake City says:
February 26, 2014
Do you have something that could replace the crank assembly for a Hurd window.
Dave from SWISCO responded:
February 28, 2014
I'm afraid I cannot identify what this operator is based on only this image of the base. I would need to see the operator arms, as well. Can you show them to me? In the meantime, check out our 39-221 and see if this is a possible match.