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Important Modern & Vintage Timepieces.

Hong Kong, October 27, 2018

LOT 226

ECOLE PROFESSIONNELLE DE LA VALLÉE DE JOUX HOROLOGICAL SCHOOL WATCH, STAINLESS STEEL

Stainless steel, manual-winding, round-shaped, gentleman's Horological School wristwatch, water-resistant with screwed case-back, subsidiary seconds at 9 and two horological complications: 1/5 second chronograph with round push-pieces, Half-instantaneous 30-minute recorder (subsidiary dial at 3 o'clock)

Brand Ecole Professionnelle de la Vallee de Joux

Model Horological School watch

Year circa 1950

Caliber Valjoux 23 (ebauche by Raymond Frères, Les Bioux, Vallée de Joux), Glucydur screw-balance and self-compensating Breguet hairspring

Bracelet black leather strap

Accessories Accompanied by the original fitted box, certificate of origin, setting pin and booklets

Dimensions Ø 35 mm.

Signed Dial

HKD 16,000 - 20,000

CHF 2,000 - 2,500 / USD 2,100 - 2,600

Sold: HKD 22,500


Grading System
Grade: AAA

Excellent

Case: 3-8

Good

Slightly scratched

Movement: 3*

Good

Overhaul recommended, at buyer's expense

Dial: 3-01

Good

HANDS Original


Notes

Valjoux 23 and the Swiss Horological Schools This calibre - one of the most famous in the history of 20th century watchmaking - has often been used by students of horological schools to complete their learning on chronographs. Thus, one finds with dials of the Ecole Professionnelle d'Horlogerie (Professional School of Watchmaking) of the Vallée de Joux, the Technicum of La Chaux-de-Fonds but also of the Atelier d'Apprentissage d'Horlogerie (Workshop of Apprenticeship of Horology) of Porentruy (Jura).