Not mine, though - this dirty watch was given to inspect and repair. It was in not bad condition, very dirty, and I only had to replace two broken balance bearing screws and straighten the hairspring. It is best to work on a hairspring (flat hairspring, as Breguet is much more tricky) having the spring attached to the balance cock alone. All you have to do is shape the outer coil so that the collet is directly over the bearing. BTW - this collet is upside down - I think... The balance is an interesting one. It says 'Antoine balance' on the caseback, and it is a bi-metallic balance with large, movable weights on the inner side of the rim... The most interesting part of the watch. Later invars don't have them, but this is an early Invar, with the lovely 00760 S/N on the plates. Assembling is easy. The crown wheel is attached to the underside of the barrel bridge... ...and the click is attached to it by a steel pin/rivet. Assembling the barrel bridge with the springing click is a tad tricky - I decided to hold the bridge by the click hole, holding the click in place at the same time. It is important to remember where the long screw should be - the barrel bridge has one long and two short screws and it is important. Later I assembled keyless works and gear train: Nothing interesting there. A button operated keyless works and an ordinary train... Running and cased! Ordinary, sliver cased pocket watch of the era... The three foot dial has dial screws on the side of the movement. Not very worn... The '84' silver mark says this was imported to Imperial Russia... And that's it! All in all, a pretty ordinary watch with and unusual balance. Thanks for looking !