Doug71
Established Member
I've never seen this in any windows. it's like a gunstock in the top sash. it's in a cottage in Northumberland I'm staying in. also there's no weights or boxes or evidence of them being there( bit dangerous tbh)
I made a few sliding sash windows for a customer who had a little cottage in Ireland, he didn't want any weights, boxes or even springs in them. He said in the area he was from it was traditional to just have a small stick next to the window that you used to prop the sash open