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The Encyclopedia of Horology

Wristwatch · Minute-repeating tourbillon wristwatch

Franck Muller Imperial Tourbillon Répétition Minutes Ref. 5850 RM T

Partially verified

This Franck Muller "Imperial Tourbillon, Répétition Minutes" wristwatch, numbered 19, is housed in a platinum case with a distinctive curvex, vertical tonneau-shaped profile. The watch features a manual-winding movement, identified as caliber TRM 95, which is adjusted to five positions and finished to a "First Quality" standard. The watch incorporates two complex complications: a minute-repeater, which operates on two steel gongs and is activated by a slide located at 9 o'clock, and a power-reserve indication displayed on a sector at the 10 o'clock position. The silver guilloché dial displays radial Arabic numerals and features a visible one-minute tourbillon regulator with subsidiary seconds. The watch is fitted with a sapphire-crystal case-back secured by four screws, allowing visibility of the movement, and is completed with a black crocodile leather strap and a platinum buckle.

Front view of the Franck Muller Imperial Tourbillon Répétition Minutes, showing the tourbillon aperture, power reserve sector, and Arabic dial numerals.
Front view of the Franck Muller Imperial Tourbillon Répétition Minutes, showing the tourbillon aperture, power reserve sector, and Arabic dial numerals. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Minute-repeating tourbillon wristwatch
Maker / attribution
Franck Muller
Reference
5850 RM T
Catalogue / lot identifier
257
Source-reported date
circa 2000-2010
Source-reported place
Switzerland
Source-reported serial
19

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

The watch features a vertical tonneau-shaped platinum case, described as having a curvex profile. It is equipped with a sapphire-crystal case-back secured by four screws, which permits viewing of the internal movement components. On the left side of the case, a slide is integrated for the activation of the minute-repeater mechanism.

The dial is rendered in silver with a guilloché or engine-turned finish. It features large, radial Arabic numerals. A dedicated sector for the power-reserve indication is positioned at 10 o'clock, while a subsidiary seconds indicator is integrated with the visible one-minute tourbillon regulator at the 6 o'clock position.

Evidence for this section
  • “Platinum, manual-winding, curvex, vertical tonneau-shaped, gentleman’s wristwatch, water-resistant with sapphire-crystal case-back screwed by four screws”
  • “silver guilloché (engine-turned) dial with large revolving radial Arabic numerals, with subsidiary seconds at 6, visible one-minute tourbillon regulator and two horological complications: • Minute-repeater on two steel gongs (activated by the slide at 9 o’clock) • power-reserve indication (sector at 10 o’clock).”

Movement and Complications

The watch is powered by a manual-winding caliber designated as TRM 95. According to the provided specifications, this movement is adjusted to five positions and designated as "First Quality". The horological complexity of the movement includes a minute-repeater system utilizing two steel gongs, alongside the one-minute tourbillon regulator which is visible from the dial side.

The mechanical design allows for the monitoring of the power reserve via a sector located on the dial. The movement is unsigned by number, though the case carries the number 19, consistent with the overall limited production nature of the reference as identified in the provided documentation.

Evidence for this section
  • “Caliber TRM 95, adjusted to five position, “First Quality””
  • “Minute-repeater on two steel gongs (activated by the slide at 9 o’clock)”
  • “power-reserve indication (sector at 10 o’clock)”

Provenance and Condition

The documentation classifies this object under lot number 257. The auction description provides a grading system where the movement is listed as Grade 3, while the case is identified as Grade 3-8, described as "Good" but with the specific note of being "Slightly scratched". The dial condition is assigned a Grade 3-01, noted as "Good".

The watch is accompanied by its original fitted box and a certificate of origin. The signature is noted as present on the dial, the case, and the movement, confirming the identification of the piece as a Franck Muller original.

Evidence for this section
  • “Grading System Grade: AAA Excellent Case: 3-8 Good Slightly scratched Movement: 3 * Dial: 3-01 Good”
  • “Accessories original fitted box, certificate of origin”
  • “Signature dial, case and movement”

Open research questions

  • What is the specific production timeframe for this reference within the 2000-2010 range?
  • How many total units were produced in the Imperial Tourbillon series under reference 5850?

Source evidence

Recorded claims and source quotations for Franck Muller Imperial Tourbillon Répétition Minutes Ref. 5850 RM T
FieldSource-reported valueSource quotation
MakerFranck Muller“Franck Muller”
Reference5850 RM T“Ref. 5850 RM T”
Serial number19“No. 19”
Case materialPlatinum“platinum”
CaliberTRM 95“Caliber TRM 95”
ConditionSlightly scratched case“3-8 Good Slightly scratched”

Visible details

  • Silver guilloché dial with radial Arabic numerals
  • Visible one-minute tourbillon cage at 6 o'clock
  • Minute-repeater activation slide on the left side of the case
  • Movement visible through the sapphire-crystal case-back

Research qualifications

  • The source attributes the date to a broad circa 2000-2010 range
  • The auction description reports the case is 'slightly scratched'

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

Consulted source

Franck Muller -Ref. 5850 RM T, tourbillon, minute-repeater, power-reserve; “Imperial Tourbillon, Répétition Minutes”; platinum

Reviewed 2026-10-26 · Record 41fb2e402d

Terms in this record

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

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