芝柏錶 Chaux de Fonds，錶殼號 51363，54 mm，185 g，約 1873
Girard-Perregaux, Chaux de Fonds, Case No. 51363, 54 mm, 185 g, circa 1873
A gentleman's magnificent pocket watch with one-minute tourbillon
Case: 18k gold, lavishly florally hand-engraved, signed and engine-turned gold dome, "Chronometro, Girard Perregaux, Chaux-de-Fonds", glazed movement. Dial: silvered, applied floral gold ornaments, chased, radial Roman hours, auxiliary seconds, "Fleur de Lys" hands. Movm.: bridge movement, German silver, stripe-decorated, mirror-polished pink gold train, screwed gold chaton, wolfteeth winding wheels, finely mirror-polished, bevelled steel tourbillon cage - second type of Guinand's steel carriage - under mirror-polished steel bridge, gold screw compensation balance, fine adjusting device, "anti-galop" feature.
The amplitude limiting device ("anti-galop" feature)
A small blued steel pin which is fixed on one of the turns of the balance spring and at right angles to its surface, forms the amplitude limiting device (the "anti-galop" feature); the pin is mounted in such a way that in case of too large an amplitude of the balance spring, it blocks the gap between two upright pins and suppresses the further turn of the balance.
机蕊 非常好, 走動正常
机蕊 非常好, 走動正常