- Year
- 2026
- Condition
- Unworn
- Set
- Box and papers
- Movement
- Manual winding
- Size
- 42.50 mm
Set and condition
Complete set
This Double Balancier Convexe Titanium is accompanied by its original presentation box, warranty card and supporting documentation. The watch and included items are inspected by an expert watchmaker before sale. Additional photographs and video of this piece are available on request.
Original presentation box
Original presentation box and packaging.
Original papers
Warranty card and supporting documentation.
Inspected prior to sale
Reviewed for condition, completeness and functionality. Additional details and photographs are available on request.
Condition photography
Additional close-up images of specific areas are available before purchase.
Overview
Two balances, one average
The Greubel Forsey Double Balancier Convexe, Titanium execution, in natural titanium, 42.5 mm and 14.35 mm high, water-resistant to 100 m. Two balance wheels averaged by a spherical differential over 4 minutes, with hours, minutes, small seconds and power reserve; manually wound; 88 timepieces, 2023 to 2026.
The Double Balancier Convexe carries two balance wheels linked by a spherical differential, which is the mechanism the model is named for. The brand's framing is a watch that goes under a fitted sleeve or sits open on a bare wrist, and lets the owner show or cover the movement as they like.
The differential sits between 6 and 7 o'clock, visible on the dial. Two balances never run at exactly the same rate; the differential takes both and passes their average to the hands, resolving it in four-minute sequences, so that the error of one wheel is set against the other rather than passed on. The plate is titanium, grained, which the brand notes as a hard finish on a hard metal, and each balance bridge is openworked, flat black-polished and hand-bevelled. The lettering on the barrel cover is drawn to suggest its rotation. Manual winding, 72 hours of reserve.
For collectors
The differential is placed on the dial side, between 6 and 7 o'clock, so its four-minute cycle can be watched rather than inferred.
Key details
Design and engineering
- Spherical differentialLinks the two balances and passes their average rate to the train, resolving it over 4-minute sequences. Set between 6 and 7 o'clock, on view.
- Grained titanium plateThe main plate is titanium, hand-grained; titanium is hard, so the brand counts the finish among its more demanding ones.
- Openworked balance bridgesEach bridge is openworked, flat black-polished and bevelled by hand — a combination the brand singles out for the skill it takes on a pierced part.
- Convexe case42.5 mm across and 14.35 mm overall; the bridges and main plates are titanium.
- BarrelThe lettering on the barrel cover is drawn into the case's lines to suggest the barrel's rotation; 72 hours of guaranteed reserve.
Movement
- Manual winding; Double Balancier; hours, minutes, small seconds, power reserve
- Spherical constant differential, one rotation in 4 minutes
- Titanium plate, grained; openworked flat black-polished balance bridges
- 21,600 vibrations per hour
- Power reserve 72 hours
The reference
Technical specifications
| Collection | Balancier |
|---|---|
| Movement | Manual winding |
| Functions | Movement with manual winding, Double Balancier, hours and minutes, small seconds, spherical constant differential rotation in 4 minutes, power reserve |
| Case dimensions | 42.50 mm |
| Case thickness | 14.35 mm |
| Case material | Titanium |
| Water resistance | 10 atm - 100 m - 328 ft |
| Power reserve | 72 hours |
| Frequency | 21,600 vibrations/hour |
| Limitation | 88 timepieces (2023-2026) |
| Reference | Not published by the brand — sourced by model and execution |
Buying with HYPA
Purchase with confidence
- Original warranty card included, dated 2026
- Free insured delivery within Australia and Hong Kong · elsewhere quoted
- Payment by bank transfer
- Registered Australian dealerHYPA International Pty Ltd · Registered Victorian second-hand dealer, Registration No. SHD-0018017.
- Direct specialist supportSpeak with the HYPA team before, during and after the purchase.
- Rated 5.0 on Google · 11 reviewsFrom clients of HYPA International on Google. Read the reviews
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