Vintage clock keys

A set of three brass clock keys, plus one lovely old winder. 

I know nothing about clock keys, but I will try to give a good description of what we have here. The brass ones, the two larger ones look to be for very similar size shafts - approx 4mm, but the small one is definitely smaller - just under 3mm I reckon.

The old clock key is for about a 5mm shaft. It's a beautiful old key