See attached photo. The defective operators for which I would like to order replacements are installed on the left side of three-pane jalousie windows. The vertically spaced screw holes measure 5.25"CTC and the horizontally spaced ones measure 1.375". The link arm measures 2.25". The dimensions for 39-193 are very close. The only difference is a 1/8" discrepancy in the link arm. Do you think 39-193 (39-194) would work? Thanks. Howard