18ct white gold Wrist Chronometer no. 6647

Case: s/n; 10521, 18k white gold, rectangular stepped with hooded lugs, hallmark is a key with number 26 which refers to the case maker Ponti, Gennari & Cie, Geneve. Dial: silvered dial, signed "Niton, Geneve", jump hour aperture, minute disk and subdial seconds Movement: s/n; 6647, 10''' tonneau, 18 jewels, all adj, Geneva seal. The movement obtained the Poincon de Geneve quality seals on October 25, 1930 and was part of a batch of 6 (6646-6651) Provenance: 1930 circa - Niton, Geneve 1980 - Dr. Crott, Auction 1991 - Antiquorum 2018 - Antiquorum Antiquorum, 20 Oct 1991 est CHF 28,000 - 35,000 unsold "Niton, Genève, No. 10521, 1930's. Very fine and rare, tonneau shaped, jumpinghour, 18ct white gold gentleman's wristwatch. C. massive, polished, hinged back, stepped sides, hooded lugs. D. mat silver, with painted Arabic numerals, at the centre, revolving disc for the minutes + auxiliary seconds dial, aperture for the jumping-hours. M. 9"' tonneau, rhodiumed, 18 jewels, lever escapement, cut bimetallic balance adjusted to 8 positions, Breguet balance-spring. Dial, case and movement signed. In very good condition. Dim. 24x37 mm. C. massive, polished, hinged back, stepped sides, hooded lugs. D. mat silver, with painted Arabic numerals, at the centre, revolving disc for the minutes + auxiliary seconds dial, aperture for the jumping-hours. Dr. Crott, Auction 42, Lot 60. Niton Geneve, Gehäuse Nr. 10521, Werk Nr. 6647. Springende Stunde Art Deco Weißgold Armbanduhr, um 1930. Gestuftes 18-k-Weißgoldgehäuse mit verschraubten Bandanstößen und Scharniergelenk. Versilbertes 3-teiliges Zifferblatt'mit Stundenfenster bei ,,12", mittiger Minuten- Drehscheibe, kleine Sekunde, geometrisches Art Deco- Dekor in den Zifferblattecken. Hochfeines vern. Form-Ankerwerk bez. Nitron Geneve, 18 Rubine, 8 Adjustierungen, Genfer Gütestempel, Anker- und Ankerrad in Rubindecksteinen gelagert, Bimetall-Kompensationsunruh, Breguetspirale, 18 k Weißgoldschließe Äußerst seltene Art Deco Armbanduhr von Niton. Zu dieser Uhr liegt ein Schreiben der Nachfolgefirma Sarcar vor, in dem erwähnt wird, daß die Firma Niton flache, komplizierte Formwerke produzierte und u. a. für die Firma Patek Philippe. Vacheron & Constantin sowie Gübelin lieferte. Wir zitieren: „Wir mußten kürzlich eine Formuhr Patek Philippe mit Ka lendarium untersuchen. Das Werk dieser Uhr ist als Niton Fabrikation No. 5094 signiert. Das Werk Ihrer Uhr ist bis auf die unterzifferblattseitige Kadratur baugleich . . ." Niton Geneve, case no. 10521, movement no. 6647, jumping hour Art Deco white gold wrist watch, about 1030. Stepped 18 k hinged case with screwed lugs. Silvered 3-part regulator type dial with jumping hour window at „12". Center minute hand disc, small seconds. Art Deco geometrical corner decoration. Very fine form lever movement signed Niton Geneve, 18 jewels, 8 adjustments. Geneva quality seal, lever and escape wheel in ruby endstones, bimetallic compensation balance, Breguet spiral spring. 18 k buckle A letter by the Niton successor Sarcar S.A. is certifying the originality, rarity and quality of the watch. The letter also says, that this watch no. 6647 beside the workmanship under the dial identical to the 5049 a rectangular calendar moonphase watch sold to Patek Philippe in 1928. 2018 - Antiquorum 21 Apr 2018 est HKD 63,000 - 126,000 sold HKD 140,277 "NITON JUMPING HOUR WHITE GOLD Very fine and extremely rare, manual-winding, 18K white gold jumping-hour wristwatch with Geneva seal movement. Brand, Niton Geneve, Year Made in the 1930s Bracelet Leather strap with 18K white gold buckle Numbers Case N. 10521, Movement N. 6647 Dimensions 24 x 37 mm. Signature Dial, Case and Movement. "