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The Encyclopedia of Horology

Wristwatch · Tourbillon wristwatch

Moritz Grossmann Benu Tourbillon Orange Titanium, Ref. MG-002066

Partially verified

According to Christie's, this Moritz Grossmann Benu Tourbillon wristwatch, reference MG-002066, is a unique one-off piece dating to circa 2018. It features a 44.5 mm brushed titanium case paired with an imitation alligator leather strap in orange. The solid silver three-part dial is rendered in orange with two grey subsidiary dials for running seconds and hours. A prominent aperture at 6 o'clock displays a flying three-minute tourbillon assembly with a V-shaped balance bridge. The source reports that the manual calibre 103.0 incorporates a Grossmann winding mechanism and pusher along with a balance stop mechanism using a human hair brush.

Front view of the Moritz Grossmann Benu Tourbillon Orange Titanium showing dial layout, tourbillon aperture, and orange strap
Front view of the Moritz Grossmann Benu Tourbillon Orange Titanium showing dial layout, tourbillon aperture, and orange strap — Christie’s. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
onlineonly.christies.com
Category
Wristwatch · Tourbillon wristwatch
Maker / attribution
Moritz Grossmann
Reference
MG-002066
Catalogue / lot identifier
209
Source-reported date
circa 2018
Country
Germany

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

Identity and Edition Status

This Moritz Grossmann wristwatch, catalogued under reference MG-002066, is designated as a Benu Tourbillon model dating to circa 2018. The auction listing describes it as a unique piece, noting: 'One-off piece in titanium.' and recording an 'Engraving 1 / 1.'

The catalog records a 44.5 mm brushed titanium case paired with an 'Imitation alligator leather strap' in orange, matching the bright orange and grey colour scheme described in the essay.

Evidence for this section
  • “One-off piece in titanium.”
  • “Engraving 1 / 1.”
  • “BRACELET MATERIAL: Imitation alligator leather strap”
  • “CASE DIAMETER: 44.5mm”

Dial Construction and Visible Architecture

The visible watch face displays a bright orange dial base flanked by two grey subsidiary dials situated at 9 and 3 o'clock, which the source describes as 'Orange, solid silver, three parts, grey hour and second'.

A central minute hand features an extended opposite end designed to read an inverted scale above the tourbillon: 'The area between 25 and 30 minutes left by the tourbillon cut-out can be precisely read thanks to the extension of the minute hand on an opposite scale (patented).' Visible observation confirms a large circular tourbillon aperture at 6 o'clock housing a balance assembly beneath a V-shaped balance bridge.

Evidence for this section
  • “Bright orange dial surface with two grey subsidiary dials situated at 9 and 3 o'clock.”
  • “DIAL: Orange, solid silver, three parts, grey hour and second”
  • “The area between 25 and 30 minutes left by the tourbillon cut-out can be precisely read thanks to the extension of the minute hand on an opposite scale (patented).”
  • “Large circular tourbillon aperture at 6 o'clock with visible balance wheel and V-shaped bridge.”

Reported Movement and Case Controls

Visible case features include a brushed titanium case with a winding crown at 3 o'clock and an auxiliary pusher situated near 4 o'clock. The catalog identifies these functions as the 'Grossmann winding mechanism and pusher'.

The movement is identified by the source as manual caliber 103.0. The listing reports a 'Flying three-minute tourbillon with screw-secured driving wheel and V-shaped balance bridge' as well as a 'second stop with a brush made of human hair to stop the balance.'

Evidence for this section
  • “Brushed titanium case with winding crown at 3 o'clock and an auxiliary pusher around 4 o'clock.”
  • “Grossmann winding mechanism and pusher”
  • “CALIBER: 103.0”
  • “Flying three-minute tourbillon with screw-secured driving wheel and V-shaped balance bridge”
  • “second stop with a brush made of human hair to stop the balance.”

Open research questions

  • What specific individual serial number or case markings are engraved on the unpictured case back alongside the noted 1 / 1 engraving?
  • What specific buckle metal and clasp design are fitted to the imitation alligator strap?
  • Does the warranty card indicate the original sale date or commissioning client for this piece?

Source evidence

Recorded claims and source quotations for Moritz Grossmann Benu Tourbillon Orange Titanium, Ref. MG-002066
FieldSource-reported valueSource quotation
Case materialBrushed titanium“CASE MATERIAL: Brushed titanium”
Case diameter44.5mm“CASE DIAMETER: 44.5mm”
Calibre103.0“CALIBER: 103.0”
Circa date2018“CIRCA: 2018”
DialOrange, solid silver, three parts, grey hour and second“DIAL: Orange, solid silver, three parts, grey hour and second”
Tourbillon mechanismFlying three-minute tourbillon“Flying three-minute tourbillon with screw-secured driving wheel and V-shaped balance bridge”
Strap materialImitation alligator leather strap“BRACELET MATERIAL: Imitation alligator leather strap”
Accompanying accessoriesMoritz Grossmann presentation box, warranty card, instruction manual, wiping cloth, magnifying glass“ACCESSORIES: Moritz Grossmann presentation box, warranty card, instruction manual, wiping cloth, magnifying glass”
Movement caliberCaliber 103.0“CALIBER: 103.0”

Visible details

  • Bright orange dial surface with two grey subsidiary dials situated at 9 and 3 o'clock.
  • Central minute hand with extended opposite tip reading the recessed 25-to-35 minute track above the tourbillon aperture.
  • Large circular tourbillon aperture at 6 o'clock with visible balance wheel and V-shaped bridge.
  • Brushed titanium case with winding crown at 3 o'clock and an auxiliary pusher around 4 o'clock.
  • Orange leather strap with alligator embossing.

Research qualifications

  • Movement and case back are not visible in the provided image.
  • The 1/1 engraving mentioned in the essay is located on the unpictured reverse.

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

Consulted source

MORITZ GROSSMANN, BENU TOURBILLON ORANGE TITANIUM, MG-002066, | Christie’s

Reviewed 2026-10-21 · Record d46cfb4dfa

Terms in this record

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

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