The top of the long arm is stamped with "Entry Gard TRUTH"
The bottom of the long arm is stamped "30757LH"
The shorter angled arm is stamped "30851"
The shorter straight arm (attached to the angled arm) is stamped "20312"
It looks like the spiral gear on the handle crank is worn down, but it appears from my uneducated observation that the entire mechanism needs to be replaced.
Can you tell me what I need to order to repair this window?