# Jean C. Blaser Tourbillon Sous Carrousel Review by A.I. WatchMetrics

## Watch Summary
The Jean C. Blaser Tourbillon Sous Carrousel exemplifies independent Swiss haute horlogerie with its 43mm platinum case housing a proprietary manual-wind caliber featuring a flying tourbillon fused with a sous carrousel mechanism for constant force and superior precision, targeting elite collectors who value groundbreaking complications over practical daily use, complete with a generous 100-hour power reserve.

## Overall Watch Rating: 9.0/10.0

**Rarity Metric (9.9/10.0)** - With production limited to mere single-digit pieces ever made, it outshines even the rarest Richard Mille one-offs in exclusivity.

**Movement Metric (9.9/10.0)** - The in-house manual caliber delivers unmatched complexity, finishing, and chronometric performance on par with A. Lange & Söhne's zenith pieces.

**Material Metric (9.8/10.0)** - Platinum 950 construction, double sapphire crystals, and hand-polished finishing elevate it beyond standard gold Rolex Daytonas.

**Complications Metric (9.7/10.0)** - The innovative flying tourbillon sous carrousel combo achieves timekeeping stability rivaling top Greubel Forsey innovations.

**Brand Metric (9.7/10.0)** - Jean C. Blaser's haute horlogerie stature and minuscule output place it firmly among elites like F.P. Journe.

**Dials & Design Metric (9.6/10.0)** - Intricate guilloché dial with Roman numerals and balanced complication integration rivals Vacheron Constantin's artistic mastery.

**History & Innovation Metric (9.4/10.0)** - Blaser's pioneering constant-force mechanisms honor Swiss tradition while pushing boundaries akin to early Girard-Perregaux.

**Versatility Metric (6.5/10.0)** - Suited primarily for formal collector display, it trails rugged tool watches like the Omega Seamaster for all-day adaptability.

**Functions Metric (6.5/10.0)** - Essential timekeeping plus power reserve indication suffices for purists but lacks multifunctionality of a Grand Seiko Spring Drive.

## Total Performance Score (TPS): 4.1

## WM Collector Grade: C

## Performance Insights: Dominates in rarity, movement excellence, and complications while versatility and functions lag, delivering solid collector appeal at a discount to its implied $470,000 fair value price.

## TPS Interpretation: Modest Value: The watch offers masterful haute horlogerie artistry with room for more practical features at its ambitious price point.

## Watch Data
[https://images.chrono24.com/image/jean-c-blaser/flying-tourbillon-sous-carrousel-34789022.jpg?w=750] - [Front picture]; [https://images.chrono24.com/image/jean-c-blaser/flying-tourbillon-sous-carrousel-34789022-2.jpg?w=750] - [Back picture]; [] - [No lume picture]; [Blaser TSC] - [Blaser Tourbillon Sous Carrousel]; [Jean C. Blaser] - [Jean C. Blaser]; [Tourbillon Sous Carrousel] - [Tourbillon Sous Carrousel]; [Switzerland] - [Switzerland]; [https://www.jean-c-blaser.ch/flying-tourbillon-sous-carrousel/] - [https://www.jean-c-blaser.ch/flying-tourbillon-sous-carrousel/]; [] - []; [Mechanical Manual Wind] - [Mechanical Manual Wind]; [Calibre JC Blaser 01] - [Calibre JC Blaser 01]; [3] - [3]; [Haute horlogerie independent with flying tourbillon sous carrousel constant force mechanism in platinum.] - [Haute horlogerie independent with flying tourbillon sous carrousel constant force mechanism in platinum.]; [43] - [43]; [51] - [51]; [13.5] - [13.5]; [22] - [22]; [30] - [30]; [100] - [100]; [21600] - [21600]; [No] - [No]; [42] - [42]; [Platinum 950] - [Platinum 950]; [Sapphire] - [Sapphire]; [Fixed] - [Fixed]; [Sapphire display] - [Sapphire display]; [Signed] - [Signed]; [Alligator leather] - [Alligator leather]; [Round] - [Round]; [Guilloché silver Roman numerals] - [Guilloché silver Roman numerals]; [Tourbillon] - [Tourbillon]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [4.1] - [4.1]; [C] - [C]; [470000] - [470000];

**A.I. WatchMetrics Review v37.4 Grok 4 Fast. December 19, 2025.**