Only Online Auction

Hong Kong, Mar 03, 2021

LOT 312

Vacheron Constantin
Precision counter-clock, regulator-type dial, stop-seconds; chromium-plated metal, mahogany

HKD 66,000 - 85,000

CHF 7,600 - 9,800 / EUR 7,000 - 9,000 / USD 8,500 - 10,900

Chromium-plated metal, open-face, key-winding, round-shaped, largeprecision counter-clock with screwed case-back, mounted in a three-body hinged mahogany box; silver colour regulator-type dial with subsidiary seconds at 6, stop-seconds (activated by the push-piece located on the case-band at 7 o’clock).

30’’’, RA 67-124, ¾ plate, gilded brass, going barrel, straight-line equilibrated lever escapement, compensated brass-Invar Guillaume balance and blued steel hairspring with terminal curve, patented polished steel index-regulator with micrometric screw.

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Grading System
Grade: AA

Very good

Case: 3


Movement: 3-9 *


Dial: 3-01


HANDS Original

Brand Vacheron Constantin, Geneva

Year 1926

Movement No. 400 933

Case No. 250 986

Material chromium-plated metal, mahogany

Diameter 83 mm.

Caliber 30’’’, RA 67-124, Guillaume Balance

Dimensions 58 x 115 x 110 mm. (box)

Signature dial and movement

Accessories ouble brass and steel winding- and setting- key; copy of the invention patent


Movement based on the Swiss invention patent No. 101 652, delivered on September 30, 1922, to Vacheron Constantin, Geneva, for a “Raquette de montre” (watch index-regulator).


Deck watch, deck chronometer and precision counter-clock by Vacheron Constantin

A “deck watch” or “deck chronometer” is a precision timepiece used on the deck of boats for navigational purposes (point reading) to avoid disturbing the proper functioning of the marine chronometer, which remains in a specific area of the ship (chronometers room or captain’s cabin).

Vacheron Constantin produced a few marine chronometers and deck watches that were mainly used on ships of the military or merchant fleets. The movements of these large timepieces had to be extremely precise and were built since 1905 with Guillaume balances and hair-springs with terminal curve (Breguet-type). Very often these movements are submitted to the tests of astronomical observatories and can obtain a Bulletin de marche.

The Genevan manufactory also used these same movements, intended for civilian use, to be fitted into table clocks enabling the brand’s retailers to have a precision timekeeper that would allow them to monitor the proper functioning of the watches they sold in their boutiques.

These clocks are occasionally referred to as “horloge de comptoir” or “counter-clock” and may be labelled “Heure exacte” (Exact time).

All these timepieces can be equipped with a subsidiary or central seconds hand and can have a power reserve indicator. They are much more rarely found with a regulator-type dial. They can be housed in silver, stainless steel or chromed metal cases or incorporated into mahogany boxes.


Guillaume Balance
The Guillaume balance is a compensated bimetallic balance, made of anibal (an alloy of steel and nickel) and brass, after the works of Dr Charles-Edouard Guillaume (1861-1938), with which the middle-temperature error is practically eliminated.
The middle-temperature error (or Dent’s anomaly), is the difference between the rate of a chronometer at the mean temperature and the average of the rates at extreme temperatures.
This type of balance was used by the horological manufactories since 1904.


· Eder, Norbert, Beobachtungsuhren, Deck Watches und Chronomètres de bord, Munich, Callwey Verlag, 1987 (216 pp.; with a Vacheron Constantin deck watch on the cover).
· The Art of Vacheron Constantin, An Important Collection of 286 Watches, Clocks and Wristwatches (thematic auction catalogue, November 13, 1994), Geneva, Antiquorum Editions, pp. 200-201.
· The Quarter Millennium of Vacheron Constantin, 1755-2005, 250 lots, Properties of Various Owners Around the World (thematic auction catalogue, April 3, 2005), Geneva, Antiquorum Editions, pp. 182-199.