sm_jamieson wrote:
Does anyone know where I can get a clock winding key ?
I have an old clockwork mantelpiece clock and I want to see if it
works.
The winding key will comprise of a square hole in a circular shaft.

It's not quite as simple as that - eg see:
http://www.clockworks.com/ckeys.html

(that's a US site so probably not much use to you directly, but you get
the idea...)

I'd be inclined to take it to a clock repairer who will be able to
supply the correct size there and then.

David