Pocket watch: rarity, Breguet pocket chronometer with split-seconds and counter, No. 2478, with original box, Paris ca. 1915: Ca. Ø55mm, ca. 113g, original silver case, dome signed and numbered 2478, case number 39725, case maker's punch AD, very fine quality Ankerchronometer, split-seconds chronograph, excellently preserved enamel dial, red and blue scale, 30-minute counter, split-seconds, in excellent condition, signed original and numbered box, matching number with dome 2478. As the watch has probably been untouched for decades, cleaning is strictly necessary. These Breguet pocket chronometers are exceptionally rare, especially with the split-seconds complication. A white gold Ankerchronometer by Breguet No.2378 was sold for an exceptionally high price of more than 38,000€ in our 197th auction.