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The Encyclopedia of Horology

Wristwatch · Self-winding chronograph with moon phases

Chronoswiss Lunar Chronograph Ref. CH 7521R

Partially verified

This Chronoswiss Lunar Chronograph, reference CH 7521R, is an 18K pink gold self-winding wristwatch manufactured circa 2000. The watch features a three-body case characterized by polished and brushed surfaces, signature ribbed front and back bezels, straight lugs with gold-screwed bars, and a screwed-down transparent case back with sapphire crystals. The guilloché silver dial includes painted Arabic numerals on a plain reserve, subsidiary dials for running seconds and chronograph registers, and an aperture for moon phases located at the 3 o'clock position. The perimeter features outer 1/5th seconds and date graduations, with time indicated by pink gold Breguet hands and a black arrow indicator for the date. It is powered by the rhodium-plated Caliber C 755 movement, which includes 25 jewels, a straight-line lever escapement, and a micrometer regulator. The watch is completed with an 18K pink gold Chronoswiss buckle.

Chronoswiss Lunar Chronograph, Ref. CH 7521R, featuring an 18K pink gold case, guilloché silver dial, and moon phase display.
Chronoswiss Lunar Chronograph, Ref. CH 7521R, featuring an 18K pink gold case, guilloché silver dial, and moon phase display. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Self-winding chronograph with moon phases
Maker / attribution
Chronoswiss
Reference
CH 7521R
Catalogue / lot identifier
42
Source-reported date
circa 2000
Source-reported place
Not established

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and Dial Construction

The timepiece is housed in an 18K pink gold three-body case, featuring a combination of polished and brushed finishing. The design utilizes signature ribbed bezels on both the front and back, paired with straight lugs secured by gold screws. The watch is water-resistant and includes sapphire crystals on both the front and the screwed-down transparent case back.

It displays subsidiary dials for seconds and chronograph registers, an aperture for moon phases at the 3 o'clock position, and outer scales for both 1/5th seconds and date graduations. The display is completed with pink gold Breguet hands and a dedicated black arrow hand for the date function.

Evidence for this section
  • “Three-body, solid, polished and brushed, screwed-down transparent case back, ribbed front and back bezels”
  • “Guilloche silver with painted Arabic numerals on a plain reserve, subsidiary dials for the seconds, the 12-hour and 30-minute registers, aperture for the moon phases at 3”

Movement and Escapement

The watch is powered by the self-winding Caliber C 755 movement. This rhodium-plated mechanism is decorated with fausses côtes and contains 25 jewels. The watch employs a straight-line lever escapement paired with a monometallic balance and a self-compensating flat balance spring.

Additional technical features of the caliber include a shock absorber system and a micrometer regulator to facilitate timing adjustments. The movement is signed, and the case bears an individual numbering, as confirmed by the accompanying auction documentation.

Evidence for this section
  • “Cal. C 755, rhodium-plated, fausses cotes decoration, 25 jewels, straight line lever escapement”
  • “monometallic balance, shock absorber, self-compensating flat balance spring, micrometer regulator”

Condition and Attribution

The provided documentation includes a grading system for the timepiece, assigning an overall grade of AA. The auction house reports the individual components, specifically the case, movement, and dial, as being in "As new" condition. The hands are noted as being original to the piece.

The watch is attributed to a production date of circa 2000. All descriptive details regarding the construction and condition are based on the auction description, which also specifies the inclusion of an 18K pink gold Chronoswiss buckle.

Evidence for this section
  • “Grading System Grade: AA Very good Case: 1 As new Movement: 1 As new Dial: 1-01 As new”
  • “Made circa 2000.”

Open research questions

  • What is the specific individual serial number of this watch case?
  • Is there a specific production range for this reference within the Chronoswiss catalog?

Source evidence

Recorded claims and source quotations for Chronoswiss Lunar Chronograph Ref. CH 7521R
FieldSource-reported valueSource quotation
MakerChronoswiss“Chronoswiss”
ReferenceCH 7521R“Ref. CH 7521R”
Case Material18K pink gold“18K pink gold wristwatch”
MovementCaliber C 755“Cal. C 755”
Diameter38 mm“Diam. 38 mm”
Thickness14 mm“Thickness 14 mm”
Jewels25“25 jewels”

Visible details

  • Ribbed case bezels
  • Moon phase aperture at 3 o'clock
  • Black arrow hand for date display
  • Transparent case back showing movement

Research qualifications

  • Serial number not specified in source text
  • No specific country of manufacture identified in source

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Lunar Chronograph Chronoswiss, 'Lunar Chronograph', Ref. CH 7521R. Made circa 2000. Fine, self-winding, water-resistant, 18K pink gold wristwatch with round button chronograph, registers, date, moon phases and an 18K pink gold Chronoswiss buckle. font color="#990000">To be sold without reserve

Reviewed 2026-10-26 · Record c5fe0dc60a

Terms in this record

Glossary explanations for terms named in this object’s record.