this is an Bergeon No 30076 clock mainspring winder set - swiss made.  It includes all of the barrels, arbors and the pieces that the arbors fit into.  Sizes are 18 mm, 25 mm, 40 mm, 48 mm, 57 mm and 65 mm. You can see the main body-frame with crank attached to it as well as a separate crank. The barrel is designed to go into your bench vice and is held in place firmly.  The handle easily winds the spring into the barrel.  After the mainspring has been wound the crank and axle are removed and the tube is easily slipped into the barrel.  A turn of the crank handle to the left takes the spring into the barrel without effort.  Box case is very finely made with piano hinge and dovetail corners with top securely screwed on.  Any questions please ask.

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