Front view
Dial, hands and bezel as delivered.
Case-back view
Case-back engraving and, where fitted, the sapphire display.
Movement
Calibre with its finishing and decoration.
On the wrist
Worn shot for proportion and strap drape.
Greubel Forsey · Tourbillon 24 Secondes
Greubel Forsey Tourbillon 24 Secondes 37 mm Mother-of-pearl Stainless
Reference 21153ST.32
Reference at a glance
- Brand
- Greubel Forsey
- Collection
- Tourbillon 24 Secondes
- Model
- Greubel Forsey Tourbillon 24 Secondes 37 mm Mother-of-pearl Stainless
- Reference number
- 21153ST.32
- Year / era
- 2004 · 2000s — modern production
- Complication
- Flyback chronograph
- Movement
- In-house manual-winding, hand-finished
- Case material
- Stainless steel
- Dial type
- Mother-of-pearl
- Strap / bracelet
- Rubber strap with titanium clasp
- Water resistance
- 300 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 37 mm
- Case thickness
- 12.6 mm
- Case material
- Stainless steel
- Bezel
- Octagonal with 8 hexagonal screws
- Crystal
- Flat sapphire with Cyclops lens
- Dial
- Mother-of-pearl
- Hands
- Skeletonised sword hands, white luminescent
- Indexes
- Applied Roman numerals
- Bracelet / strap
- Rubber strap with titanium clasp
- Clasp / buckle
- Titanium deployant clasp
- Water resistance
- 300 m
Movement
- Movement / calibre
- Calibre 58B — In-house manual-winding, hand-finished
- Movement type
- Manual-winding
- Frequency
- 36,000 vph (5 Hz)
- Power reserve
- 38 hours
- Number of jewels
- 37 jewels
- Complications
- Flyback chronograph
- Functions
- Flying tourbillon, power reserve
- Watchmaker
- The calibre is built in-house and adjusted in five positions before delivery.
Production & market
- Production period
- 2004 – 2014
- Limited-edition quantity
- Not applicable
- Current market information
- Values have stabilised after the 2022 correction; condition and box-and-papers drive the premium.
Designer
In-house design studio
The reference was drawn by the manufacture's internal design office, where case, dial and movement architects work alongside the watchmakers rather than as an outside commission.
Historical significance
Greubel Forsey Tourbillon 24 Secondes 37 mm Mother-of-pearl Stainless sits within Greubel Forsey's Tourbillon 24 Secondes line, introduced in 2004. It carries the house codes established since 2004 — stainless steel case, mother-of-pearl dial and in-house manual-winding, hand-finished — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- Early production dials show a slightly different minute track, and collectors pay a premium for them.
The House
Greubel Forsey
Brand facts
- Founding year
- 2004
- Founder
- Robert Greubel & Stephen Forsey
- Headquarters
- Switzerland
- Tier
- Ultra-Luxury & Haute Horlogerie
- Major collections
- Double Balancier, Hand Made 1, GMT, Tourbillon 24 Secondes, Balancier
- Signature technologies
- Proprietary case-hardening and polishing · Anti-magnetic silicon escapement · Hand-applied guilloché dials
- Famous movements
- In-house automatic with 22k gold rotor · In-house automatic micro-rotor · In-house manual-winding, hand-finished · In-house tourbillon, manual-winding
- Notable watches
- Greubel Forsey Double Balancier 40 mm Salmon 18k (2004) · Greubel Forsey Double Balancier 37 mm Blue Sapphire (2004) · Greubel Forsey Double Balancier 41 mm Silvered 18k (2004) · Greubel Forsey Double Balancier 42 mm Black 18k (2004)
Brand history
Greubel Forsey has spent more than 22 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Double Balancier, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Robert Greubel & Stephen Forsey established Greubel Forsey in 2004, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Greubel Forsey calibre produced today.
Historical milestones
2004
Robert Greubel & Stephen Forsey founds Greubel Forsey in Switzerland.
2024
Greubel Forsey continues to produce Double Balancier, Hand Made 1, GMT and other icons in limited numbers.
More Tourbillon 24 Secondes
Greubel Forsey Tourbillon 24 Secondes 41 mm Silvered Grade
Ref. 10298OR.28
Greubel Forsey Tourbillon 24 Secondes 44 mm Skeletonised Platinum
Ref. 69552OR.87
Greubel Forsey Tourbillon 24 Secondes 39 mm Mother-of-pearl 18k
Ref. 48370OR.23
Greubel Forsey Tourbillon 24 Secondes 44 mm Green Ceramic
Ref. 89332OR.18
Greubel Forsey Tourbillon 24 Secondes 42 mm Meteorite Sapphire
Ref. 33394OR.77