18k yellow case and white gold bezel Wrist Chronometer no. 5389

Case: s/n; 10182. 18k yellow gold with white gold bezel reverse with "ES" monogram and signed "E. Gübelin, Switzerland" Dial: Silvered, aperture for jump-hour, revolving minute disc, subsidiary seconds dial, unsigned. Movement: 10''' tonneau, nickel, bi-metallic balance with blued steel balance spring with Breguet overcoil with polished steel kidney piece, signed "5389, E. Gübelin, Lucerne, Eighteen 18 Jewels, All Adjustments, Swiss", stamped with the Geneva seal. The movement obtained the Poincon de Geneve quality seals on July 14, 1928 and was part of a batch of 6 with movements serial numbers 5389 - 5394 (in all probability all the same calibers and delivered to Gübelin). Provenance: 1928 - Niton, Geneve 1928 - Gübelin, Lucerne 2012 - Jones & Horan Auction 2021 - Bonham's, Hong Kong 2012 - Jones & Horan Auction, 5 Jun 2012, sold $8,000 "WW - Guebelin, Geneve, ("ue" = "u" with umlaut), Geneve, (by niton, Geneve), rare digital hour with constant minutes and seconds, tonneau form, 25mm wide at waist x 34mm to lug tips, 18K bicolor yellow gold original case with white gold bezel, Swiss touchmark, early leather strap with period 18K buckle possibly original to head only marked "NG" (niton Geneve?), original silvered dial, rotating sub-dial with arrow hand graphic, 18J unmarked cal 5711 with twin Geneva quality seals, fausses-cotes NI damascene, s#5389, signed "E Gubelin, Lucerne," case signed "E Gubelin, Switzerland" with internal number 10182. The identical tonneau form mvt is seen in at least two other examples in the market, both in elongated tank style cases 23mm x 38mm, one in white gold, the other in yellow gold, the white gold example sold by Antiquorum in 1998 at CHF9775, about $10,000 US. Both of those had actual arrow hands with blued tips rather than disk. Antiquorum cites the publication of the niton dial designs from 1928 in Kahlert, Muhe & Brunner, "Wristwatches, History of a Century's Development," published by Schiffer in 1986. A very rare and elegant digital dress watch, also refered to as "Jump Hour," ca 1930, in the first tonneau example we have seen. CONDITION: Mvt: GRO, good balance motion, good poise, very tarnished plates indicating some silver content to the metal (which to properly clean one must first use a silver cleaner and quickly neutralize the muriatic acid with baking soda prior to normal cleaning), no oxide on bright work; mvt will clean in this fashion by an expert to near mint with a few MFS, best to preserve the plate surface then with rhodium plating; dial fine original, slight soiling in the visible area, verdigris hidden towards the corners from bezel contact; hand disk equally clean; original finely constructed case shows very light wear, some visible original back satin, numerous MFS, no dents or dings; crown shows light wear; good crystal; good period buckle with light wear; an exceptional original example" https://www.archive.jones-horan.com/?auction=All&searchfor=Guebelin%2C+Geneve&sort_by=date&limitnbr=300&Submit=Search 2021 - Bonhams, Hong Kong Watches, 1 December 2021, 14:30 HKT, Hong Kong, Admiralty, Lot 832 E.GUBELIN, LUCERNE | JUMP HOUR, A RARE 18K YELLOW AND WHITE GOLD DIGITAL JUMP HOUR WRISTWATCH, CIRCA 1935, Movement No: 5389, Case No: 10182, Calibre: Manual winding, signed Dial: Silvered, signed, Case: Total length including lugs 35mm, 18k yellow and white gold, snap back with engraved initials signed, Strap: Leather with 18k yellow gold period buckle, Accompaniments: Maker's presentation box, signed https://www.bonhams.com/auction/27056/lot/832/egubelin-lucerne-jump-hour-a-rare-18k-yellow-and-white-gold-digital-jump-hour-wristwatch-circa-1935/ Official ledger text/ French abbreviations from the Archive from Gübelin, Lucerne, Heritage department; 24 Aug 1928; Niton S.A.; 10182; 10" or jaune 18k brossé, tonneau tortue, cornes, boite unie, lunette intér.or gris. pol.h.sautant.disque tournant, min. 2des.èm.cuir. 24 Aug 1928; Niton S.A.; case s/n; 10182; 10" brushed 18k yellow gold, tortoise barrel, horns/lugs, plain case, white gold interior bezel. polished.jumping hour.turning minute disc. seconds subdial, leather strap. Credits to; Gübelin, Maihofstrasse 102, 6006 Lucerne, Switzerland