Faulty UPVC window mechanism.

A customer’s UPVC window wouldnt open. It’s obvious why when you look at the photo. There were 4 or 5 other bits of broken cog but I dropped them in long grass.

This is a Coldseal Tallon mechanism. It was discontinued many years ago. To replace it a completely different mechanism has to be adapted in order to repair the UPVC window.

Coldseal Tallon
Broken upvc window mechanism