Window crank

Thanks for writing in Your window operator reminds me of the 39-220B and 39-221B Encore Dyad Sill Mount Operator, used with the 39-375 and 39-376 cover and handle kits. The link arms are attached to the bottom of the sash using the 39-545 and 39-546 Truth Snap-Stud Brackets. Carefully look over the dimensions below to confirm that these are the replacements you need.

detail of 39-221B

Dimensions for 39-545