Window Casement. Crank
A quick learner from Wisconsin says:
May 4, 2015
Dave from SWISCO responded:
May 5, 2015
Take a look at our 39-171 operator. Looking at your photo, this could be what you are looking for. You will, however, need to switch the position of the link arm clip. Before you do anything, though, just check our measurements with your operator to confirm that they match.