Ulysse Nardin Marine Diver Chronometer

Technical characteristics

Type

Diver's watch

Maker

Ulysse Nardin

Jewels

28

Diameter

40 mm

Movement

Cal. UN 26

Reference

263-55

Place recorded

Switzerland

Limited Edition

999 pieces

Case construction

Three-body, polished and brushed

Maker / attribution

Ulysse Nardin

Design

Visible features

• Red "1846" numeral on dial • Unidirectional revolving bezel • Sub-dial with power reserve indicator at 12 • Luminous épée hands

Case and Dial Design

The case is constructed from stainless steel as a three-body design, finished with both polished and brushed surfaces. It incorporates a graduated unidirectional revolving bezel intended for calculating decompression times during diving activities. The case back is secured by six screws and features decorative engravings related to the history and achievements of the Ulysse Nardin brand. A sapphire crystal protects the dial, and a screwed-down winding-crown is present to assist in water resistance. The dial is finished in black with a textured surface, populated by applied luminous indexes. It includes a subsidiary dial for seconds with a guilloché pattern and a central date reference, "1846," printed in red. A power reserve indicator is situated at the 12 o'clock position, while a date aperture is located at the 6 o'clock position. Luminous steel épée-style hands provide legibility for timekeeping and monitoring the dive bezel.

Movement and Mechanics

The timepiece is powered by the Ulysse Nardin Caliber UN 26, a self-winding automatic movement. The movement features a visual decorative finish described as "oeil-de-perdrix," which is applied to the visible components. Mechanical regulation is achieved through a micrometer regulator, and the movement is constructed with 28 jewels. The escapement is a straight-line lever type, complemented by a monometallic balance and a shock-absorber system. A self-compensating flat balance spring is utilized to regulate the oscillation of the balance.

Provenance and Condition

The watch is identified as part of a limited production run, with the specific example being numbered 895 out of 999 pieces. It comes with a titanium Ulysse Nardin double deployant clasp. The provided information indicates it is the property of a Swiss collector. The auction description provides a grading system for the watch's condition. The case and movement are both listed as Grade 1, representing "as new" condition, although the movement carries an additional notation recommending professional servicing. The dial is also rated as "as new," and the hands are identified as original to the timepiece.

Identification

Reference

263-55

Serial number

895

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.