Rolex Reference 8171 Triple Calendar Moonphase Wristwatch

Technical characteristics

Type

Calendar & moon-phase watch

Caliber

10 1/2'''

Case Number

820772

Case Diameter

38 mm

Dial Condition

Slightly oxidized

Hand Condition

Partially replaced

Movement Jewels

18

Maker / attribution

Rolex

Design

Visible features

• Blue outer calendar track with Arabic numerals • Moon phase aperture with human face illustration • Luminous material visible on hour and minute hands • Concave lugs integral to the case profile

Case and Dial Design

The Rolex reference 8171 features a three-body stainless steel case with a polished finish. Its construction includes a sloped bezel, concave, curved lugs, and a snap-on case back. The case band contains integrated correctors to facilitate setting the triple calendar functions. The matte silver dial displays applied steel dart and pyramidal indexes, complemented by a large Arabic numeral 12. The dial layout incorporates a subsidiary seconds dial, which integrates the moon phase aperture. The calendar indications include an outermost graduation for the days of the month written in blue Arabic numerals, paired with a central pointer hand. Apertures located below the 12 o'clock position provide displays for the days of the week and the months. The hands consist of luminous steel alpha-style indicators for hours and minutes.

Condition and Collector Context

The condition grading provided by the auction house notes that the case and movement are in 'Good' condition. The dial is described as having slight oxidation, and it is noted that the hands have been partially replaced. The reference 8171 is identified as a model produced between 1949 and 1952. It was manufactured in stainless steel as well as 18K yellow and pink gold.

Movement and Mechanical Details

Internally, the watch is powered by a rhodium-plated, self-winding movement identified as the 10 1/2''' caliber. The movement contains 18 jewels and utilizes a straight-line lever escapement. To ensure consistent timekeeping performance, it is fitted with a Superbalance and a self-compensating Breguet balance spring. The movement is antimagnetic and signed by the manufacturer. The auction description confirms that the dial, case, and movement are signed. The watch is presented on a strap with a stainless steel Rolex buckle, completing the original configuration of the timepiece.

Identification

Reference

8171

Serial number

820772

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.