The numbers 45035, 40351 and 40352 are stampings on our 30905 operator, or more specifically our Truth Split Arm Operator 30905. These numbers are just stamping numbers, but they help us make an educated guess that you have the Truth Split Arm Operator 30905. We find the number 45035 cast into the crank gear box housing. We find the number 40351 on the right hand arm, and 40352 on the left hand arm. The number 30905 we find on the linkage arm which connects to the window or sash through a bracket. The linkage arm measures 4-1/2″ from rivet to the center of the hole, and measures 5″ overall length. The linkage arm offsets upward. This window crank can be found on our window website @ https://www.homewindowrepair.com/truth-split-arm-operator-30905.html