The Clock with no name, swivel action in a curved housing, brass structure with a notch at the rear.

This is a fairly ancient clock its made from Brass in a curved half moon shaped quite heavy and measures 14cm across the face. It is not marked with a name.

Its working with an almost silent tick but the most interesting intriquing feature is that it swivels to reveal the rear winder and adjustment. There is also a notch which I assumed was for a match box?

Its tired very tired. Has anyone ever seen such a clock?