Important Collectors’ Wristwatches, P...

Geneva, Mandarin Oriental Hotel Du Rhône, Oct 15, 2006

LOT 191

"Split Seconds Deck Chronometer" Ulysse Nardin, Locle, Suisse, No. 17747, case No. 381823. Made circa 1940. Fine and rare, "Staybrite", keyless circuit-breaker lever chronometer deck watch with split 10th-of-a-second chronograph, instantaneous 15-minute register and original mahogany three-tier deck box with electrical contacts.

CHF 4,000 - 6,000

EUR 2,500 - 3,800 / USD 3,300 - 5,000

Sold: CHF 4,956

C. Four-body, "bassine et filets", polished, insulated electrical contact in the band at 9 o'clock. Hinged cuvette. D. White enamel, bold Arabic numerals, outer minute track, outermost fifths of a second divisions and Arabic 3-second numerals, subsidiary seconds at 6, instantaneous 15-minute register at 12. Blued steel "spade" hands. M. 50 mm. (22'''), rhodium-plated, "fausses côtes" decoration, 28 jewels, fast-beating straight-line lever escapement, cut bimetallic compensation balance, Breguet balance spring, swan-neck micrometer regulator, the escape wheel arbor is fitted with a cam allowing for breaking electrical contacts every fifth of a second second via lever activated by a bolt at 6. Dial, case and movement signed. Diam. 64 mm.


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Grading System
Grade: AA

Very good
Case: 3-9

Good

Scratched
Movement: 3*

Good

Overhaul recommended, at buyer's expense
Dial: 2-01

Very good

HANDS Original

Notes

The present watch is calibrated so that 30 seconds are recorded in one revolution of the chronograph hand instead of the usual 60 seconds. This is acheived by a fast-beating escapement; the hour and minute hands are geared to operate in the usual manner. This chronograph was specially made to time events to a precision of 1/10 second.