Franck Muller Tourbillon Split-Seconds Perpetual Calendar Equation of Time Ref. 1790 QPTR
Record status
Individual type · partial
Period
1990s
Maker / issuer
Franck MullerThis Franck Muller wristwatch, identified as reference 1790 QPTR, is a complex timepiece featuring a tourbillon regulator and a perpetual calendar with an equation of time function.
Produced in the 1990s, the watch is constructed in platinum and includes a co-axial split-seconds chronograph mechanism. The dial displays multiple complications, including a moon phase aperture, retrograde equation of time, and various sub-dials for the date, day of the week, leap year, and a 24-hour register. The movement is a rhodium-plated 26-jewel caliber, notable for its hand-engraved finish and A-shaped steel tourbillon cage.
The watch features a three-body case with a transparent, hand-engraved case back and straight lugs, paired with a platinum Franck Muller buckle. It is documented by the auction description as numbered 04, with a case diameter of 39 mm and a silver satin-finished dial.
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
- Date
- 1990s
- Type
- Tourbillon chronograph with perpetual calendar
- Maker
- Franck Muller
- Material
- Platinum
- Reference
- 1790 QPTR
- Jewel Count
- 26
- Case Diameter
- 39 mm
- Serial Number
- 04
- Place recorded
- Switzerland
- Movement Caliber
- 14'''
- Maker / attribution
- Franck Muller
Design
- Visible features
- • Transparent, hand-engraved movement case back visible in the photograph. • Silver dial with pyramid-style indices and blue steel Breguet hands. • Presence of pushers for split-seconds and chronograph operation on the case side. • Hand-engraved movement components with visible tourbillon regulator.
- Case and Dial Design
- The watch features a three-body platinum case with a 39 mm diameter, characterized by straight, rounded lugs. The case construction incorporates sapphire crystals on both sides, with the case back being transparent and featuring hand-engraving. The watch is worn on a strap secured by a platinum buckle bearing the maker's mark. The dial is executed in a satine silver finish, featuring applied blued steel pyramid indices arranged on a guilloche reserve. The display is densely populated with indicators for a perpetual calendar and chronograph, including guilloched ring dials for the days of the month, the week, the leap year, and a 24-hour indication. A dedicated sector at the 9 o'clock position serves the retrograde equation of time, complemented by an aperture for moon phases and a 30-minute chronograph register.
- Provenance and Condition
- The watch is identified in the source as lot 250, numbered 04 within its specific reference series. The documentation provided confirms that both the dial and the movement are signed by the manufacturer. The auction description explicitly reports the case, movement, and dial as being in 'As new' condition, designated as Grade 1. The attribution and the descriptive details regarding the caliber and complications are derived directly from the archival data associated with this specific lot.
- Movement and Complications
- The movement is identified as Caliber 14''' and is rhodium-plated. It features a manual-winding construction with hand-engraved finishing throughout the plate and bridges. The escapement is a lateral lever type, regulated by a one-minute tourbillon featuring an A-shaped steel carriage. The balance assembly utilizes a self-compensating Breguet balance-spring and a monometallic balance wheel. The watch functions as a co-axial split-seconds chronograph. This complexity is integrated alongside the perpetual calendar mechanism. The movement architecture relies on 26 jewels to manage the various components of the astronomical and timing displays, all of which are visible through the sapphire case back.
Identification
- Reference
- 1790 QPTR
- Serial number
- 04
- 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 exact month of production within the 1990s is not specified.
- Research required: Condition ratings are provided by the auction house and represent an assessment at the time of cataloguing.