Ulysse Nardin Chronometer Co. automatic wristwatch, caliber Felsa Bidynator 690
Record status
Individual type · partial
Period
circa 1940's
Maker / issuer
Ulysse NardinThis vintage Ulysse Nardin automatic wristwatch is dated by the seller to circa the 1940s. It features a self-winding movement signed by Ulysse Nardin Chronometer Co., identified as caliber Felsa Bidynator 690 series with 17 jewels and adjusted temperature.
The movement serial is 6503325. Housed in a 33 mm round case with decorative lugs, the seller reports the metal lacks hallmarks but tested as 14K solid yellow gold. The missing original back has been replaced with a custom transparent exhibition back attached using ultraviolet adhesive. The watch is mounted on an 18 mm brown crocodile-grain leather strap.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Type
- Automatic wristwatch
- Jewel count
- 17 Jewels
- Case diameter
- 33 mm
- Case material
- 14K yellow solid gold
- Place recorded
- Switzerland
- Movement caliber
- Felsa Bidynator 690 series
- Maker / attribution
- Ulysse Nardin
- Movement serial number
- 6503325
Design
- Visible features
- • Automatic winding rotor engraved 'ULYSSE NARDIN CHRONOMETER Co.', 'ADJUSTED TEMPERATURE', 'SEVENTEEN 17 JEWELS', 'SWISS', and serial '6503325' • Balance cock stamped with export/import code 'BXP' • Transparent exhibition display back fitted to the yellow-gold-tone case • Fluted winding crown visible at the bottom edge of the case rim in the image orientation, paired with a brown textured leather strap
- Identity and Movement
- The seller dates this vintage wristwatch to circa the 1940s and identifies the self-winding mechanical movement as an original Ulysse Nardin Chronometer Co. caliber Felsa Bidynator 690 series. Movement specifications reported by the vendor include 17 jewels, adjusted temperature, sweep seconds, 18,000 A/h, and a 44-hour power reserve. Direct visual inspection of the movement confirms the automatic rotor is engraved 'ULYSSE NARDIN CHRONOMETER Co.', 'ADJUSTED TEMPERATURE', 'SEVENTEEN 17 JEWELS', 'SWISS', and serial '6503325'. The balance cock is stamped with the export/import code 'BXP'.
- Dial and Exterior Accessories
- The dial is not visible in the provided image record, which depicts only the exhibition case back view. The seller describes it as an original champagne textured dial featuring applied gold hour markers, matching gold hands, and signatures for 'Ulysse Nardin' and 'Automatic'. Visual observation shows a fluted winding crown at the case rim and a brown textured leather strap. The listing records the strap as an 18 mm new-old-stock brown crocodile-grain two-piece leather band.
- Case Construction and Alterations
- The watch is housed in a 33 mm round case featuring a fancy lug design, measuring 39.8 mm lug-to-lug and 12 mm in thickness. The seller notes that the case and lugs do not have any marks, but reports that the metal tested as 14K solid yellow gold. The original case back is missing. It has been replaced with a custom transparent exhibition back attached using ultraviolet adhesive to show the movement beneath.
Identification
- Serial number
- 6503325
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: The original case back is missing and was replaced with an aftermarket clear display back attached with ultraviolet adhesive
- Research required: Case metal lacks hallmarks and relies entirely on seller testing as 14K solid yellow gold
- Research required: Dial view is not visible in the provided image