Antiquorum Auctioneers since 1974

Geneva, November 8th-9th, 2025

Geneva, Nov 07, 2026

LOT 10

ECOLE D'HORLOGERIE, SWITZERLAND, “PIÈCE ÉCOLE”, MADE BY JACQUES AUBRY TRIPLE DATE CHRONOGRAPH MOONPHASE, STAINLESS STEEL

CHF 6,000 - 10,000

HKD 58,000 - 96,000 / USD 7,300 - 12,200 / EUR 6,500 - 10,800 / JPY 1,160,000 - 1,920,000

A fine and rare, stainless steel, manual wind triple calendar chronograph wristwatch with moonphase.

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Grading System
Grade: AA

Very good
Case: 3-8

Good

Slightly scratched
Movement: 3*

Good

Overhaul recommended, at buyer's expense
Dial: 3-6-01

Good

Slightly oxidized

HANDS Original

Brand Ecole d'Horlogerie, Switzerland

Model “PIÈCE ÉCOLE”

Year Circa 1950

Caliber Valjoux 88, 29,5 mm., 17 jewels

Diameter 36 mm.

Signature Dial and movement

Notes

Hand-engraved “23-8-34” beneath the balance staff, probably the date of birth of Jacques Aubry.