The gear seems to be worn out. Note the curve in the drive lever, unlike the one I bought which gets in its own way when closing. Mounting screws - 5-1/4, & 1-1/8, lever centers - 2-3/8"
Emily from SWISCO responded:
September 21, 2023
Hello there!
Start by taking a look at our 39-026 and 39-025 operators. We don't sell an exact match for yours but these are similar and appear to match your dimensions. Take a look and see what you think.