Exceptional Collectors Timepieces, Ho...

Geneva, May 15, 2005

LOT 137

"Medical Chronograph - Chronomètre 1st Class" Ulysse Nardin, Locle & Genève, No. 16108, case No. 360325, made in 1927 for the South American market. Very fine 18K gold lever chronometer keyless pocket watch with single button chronograph, 30-minute register, pulsometer, gold chain, seal, fitted case, spare crystal and original Ulysse Nardin certificate. Accompanied by duplicate of Bulletin Marche de l?Observatoire Astronomique e cronométique de Neuchâtel.

CHF 3,000 - 5,000

EUR 1,900 - 3,200 / USD 2,600 - 4,300

Sold: CHF 12,075

C. Four-body, "bassine", polished, chronograph button in the crown. hinged gold cuvette dedicated to Dr. CharlesPettanel. D. White enamel, Breguet numerals, outer scale graduated for 30 pulsations, 1/5th second chronographscale and concentric minutes scale, Arabic five minute/second numerals, subsidiary seconds at 6 and 30-minuterecording dial at 12. Gold "spade" hands. M. 19''', rhodium-plated, "fausses-côtes" decoration, visible chrono-graphwork, 24 jewels, straight line lever escapement, the lever and escape wheel pivots with gold jewel-caps,bimetallic compensation balance, blued steel Breguet balance-spring, swan-neck micrometer regulator.Dial, case and movement signed.Diam. 53 mm.


LOADING IMAGES
Click to full view
Image
Grading System
Grade: AA

Very good
Case: 3

Good
Movement: 2

Very good
Dial: 2 - 01

Notes

The Observatory Certificate records the following results: mean error for 6 positions: 2.19; compensation error by degree: 0.112; change of rate with change of position: 2.54. The more complicated a timepiece is, the more difficult it is to adjust, particularly as concerns complications such as a chronograph, split-seconds function, and/or a register. The additional wheelwork affects the timepiece's functioning, because of the amount of energy required - but often only sporadically, when, for example, the chronograph is in use - and because of the friction to which the moving parts of the mechanism - levers, springs, etc. - are subjected. It is therefore exceptional to find a timepiece with so many compli-cations and which were submitted to Observatory control. This watch acheived First Class chronometer rating at the Observatoire Astronomique de Neuchâtel.