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](http://www.ross-deanlocksmiths.co.uk/blog/wp-content/uploads/2018/10/20181028_113724-300x225.jpg)