Bob from SWISCO responded:
March 2, 2020
Thanks for writing in. I can't say for certain what operators you need without seeing the entire assembly, including the link arm(s), out of the window. That said, you might need our 39-155 and 39-156, or our 39-031 and 39-032. There are slight differences in the dimensions of the link arms with both sets of operators, so compare both with your old hardware to see what matches best. If you need a new handle and cover, see our 39-114L and 39-107. |