Like the Besançon Observatory, the Spacegraf opens onto the sky. Its 42mm Grade 5 titanium case is vertically brushed and framed by a circular-brushed bezel, and it holds the complication in just 12.15mm. On top, a double-domed sapphire crystal serves as the dome, with a clear view of the celestial disc and the flying tourbillon.
Spacegraf Heure Sidérale Tourbillon Volant Limited Edition
From only $1333.33 per month, flexible payment solutions available during checkout.
U.S. DELIVERY DUTY PAID
With our Delivery Duty Paid (DDP) free value-added shipping service, there are no hidden fees, duties, or taxes for our customers based in the U.S. What you see at checkout is all you pay. Enjoy a seamless, worry-free experience.
FRENCH WATCHMAKING MANUFACTURE
Premium mechanical in-house caliber designed and manufactured in our workshops in Morteau (France). All other components are sourced from Switzerland within a 70km radius of Morteau. Assemblies, calibrations and checks carried out by our watchmakers in our Morteau workshops.
FREE DELIVERY WORLDWIDE
International shipping is offered free-of-charge for purchases as from 100€. All our shipments are handled by our partner DHL. You will receive an email with the parcel tracking number the day your watch leaves our workshops in France. Upon receipt of DHL's email, note that you have the option to adjust the parcel's delivery address and/or defer the date of receipt of your package, if necessary.
5 YEAR INTERNATIONAL WARRANTY
Your timepiece enjoys a 5 year international warranty from the date of shipment. It does not cover any damage on any part of the watch resulting from abnormal use, lack of care, negligence, accidents and incorrect usage.
14 DAYS RETURN
If you change your mind you have the possibility to request a refund within 14 days of receipt of your purchase. To proceed, please contact us through our 24/7 online chat on Yema.com by providing the email address used when ordering.
24/7 CUSTOMER SERVICE
For any pre-sales or after-sales questions, our multi-lingual customer representatives are available 24/7 through online chat on Yema.com.
Spacegraf Heure Sidérale Tourbillon Volant Limited Edition
Sale price$16,000.00
MILLÉSIME 2026 LIMITED EDITION
The finest expression of YEMA’s savoir-faire
“Millésime” stands for the very best YEMA can produce: a premium, handcrafted, and highly limited timepiece that embodies the legacy of French horology and our ongoing pursuit of excellence.
The most intricate and complicated piece produced by the manufacture this year pays tribute to a founding place in the cradle of French watchmaking: the Besançon Observatory. In 1878, the city built an observatory for a single reason, to allow its watchmakers to set their watches by the stars.
The Spacegraf revives this founding gesture. On its dial, an entire disc turns to the rhythm of the real sky, this is the sidereal time complication, displaying at every moment the stars actually visible above you. At its center, a second rhythm, far faster: the flying tourbillon of the CMM.32 caliber, manufactured in Morteau, visible both from the front and through a sapphire caseback.
This is the story the Spacegraf tells on the wrist: that of a region which has always measured time by looking to the sky.
Limited to 150 numbered timepieces.
CELESTIAL DIAL
The dial is deep black, with a fine sandblasted grain under a black PVD coating, ringed by circular-brushed minute and seconds tracks. At 12 o’clock, the “celestial vault” disc turns once every sidereal day (23h 56min 4s) under a thin sapphire cover that shades from smoky to clear. At 6 o’clock, the flying tourbillon opens the dial onto the movement. The indexes are merged into 3D rings and, along with the numerals, tracks, hands and celestial disc, are treated with Super-LumiNova BGW9 Grade X1. At night, the whole sky glows on the wrist.
3D SUPER-LUMINOVA® GRADE X1
The hour markers and hands are shaped from solid 3D blocks of Grade X1 Super-LumiNova BGW9, so they glow through their full depth. At night, the celestial disc lights up too: a luminous sky on your wrist.
A sapphire caseback reveals the deep-blue CMM.32 caliber, with constellations engraved across its bridges. The flame-blued ratchet wheel bears a map of the Earth and the inscription “CMM32 – Heure sidérale”, with the flying tourbillon turning just below. Individually numbered out of 150.
FLYING TOURBILLON
Floating escapement offsetting gravity, among watchmaking’s most demanding complications
CELESTIAL VAULT DISC
Rotating star map, set to sidereal time, showing the sky above you
105 HOURS POWER RESERVE
Increased power reserve thanks to a large barrel allowing optimized winding.
HIGH SHOCK RESISTANCE
Caliber impervious to shocks, vibrations, and acceleration up to 5,000 Gs in all directions.
THE FLYING TOURBILLON, A SYMBOL OF HIGH-HOROLOGY
A true masterpiece of watchmaking, the flying tourbillon ranks among the most complex complications to produce, offering a fascinating visual spectacle thanks to its mechanism, supported solely by its base, which gives it the illusion of floating in space.
Designed to counteract the effects of gravity and improve timekeeping precision, this device demands exceptional mastery: the absence of an upper bridge requires perfect balancing of the components, lightweight materials to reduce friction, and hundreds of hours of meticulous work.
105 HOURS OF POWER RESERVE THANKS TO A LARGE BARREL
The CMM.32 has a single large barrel optimized to ensure a power reserve of 105 hours. Specifically manufactured for the CMM.32 by Générale Ressorts, this large barrel is off-centered in order to make enough room for the gears and the balance wheel so as to preserve a contained thickness.
OPTIMIZED ESCAPEMENT
Interface between the gear train and the regulating organ, the escapement is the place where energy and chronometry intersect in a complex interaction. The escapement is an energy-demanding system, it alone consumes more than half of the barrels’ energy. It is the friction of the anchor pallets on the escape wheel which, despite their lubrication, dissipates a good part of this energy.
The CMM.32 tourbillon escapement presents notable improvements which reduce this friction thanks to an innovating and particularly sophisticated manufacturing process (LiGA technology). This advanced escapement ensures optimization of the entire mechanics, precision and longevity of the caliber components.
ANTI-MAGNETIC & SHOCK-RESISTANT
Designed for everyday life, the CMM.32 presents robust technical characteristics for a tourbillon caliber. Equipped with non-magnetic components, such as a Swiss-made non-metallic alloy hairspring, a Glucydur balance wheel with an adjustment mass made in gold and micro-components manufactured with LiGA technology materials, the CMM.32 is capable of withstanding exposures to electromagnetic fields up to 2,000 Gauss, a real feat for a tourbillon caliber.
The architecture of the tourbillon cage bridge with its free-sprung balance wheel and the shock absorbers manufactured by Kif make the CMM.32 impervious to shocks, vibrations, and acceleration up to 5,000 Gs in all directions.
SIDEREAL TIME COMPLICATION
Meridian Circle of the Besançon Observatory
In 1878, at the request of Besançon’s watchmakers, a presidential decree established an astronomical, meteorological and chronometric observatory in the city. Its purpose was to certify the precision of their watches by observing the stars. It had dedicated pavilions, aligned with absolute precision, including a meridian circle with an opening roof. The observatory is still active today, affiliated with the CNRS (France’s national research centre) and working in time-frequency metrology.
The meridian circle looks at only one point in the sky: the line where, every night, the stars cross the observatory’s north-south axis. From each crossing, astronomers drew two certainties at once: the exact time and the star’s position. Besançon’s watchmakers came for this direct reading of the sky, rather than calculation, to regulate their watches.
The Spacegraf’s “celestial vault” disc brings this principle to the wrist. The meridian circle caught the sky as it passed in front of its fixed telescope. The disc instead turns continuously, set to the same 23h 56min 4s the Earth takes to turn once on its axis relative to the stars. At every moment, it shows the part of the sky actually visible above you: the same data the Observatory read from its stars, now in perpetual motion on a dial.
LEATHER STRAP WITH TITANIUM PIN BUCKLE
This black leather strap with matching black stitching tapers from 21mm to 16mm. The lining is embossed “Manufacture Française – Fondée en 1948”. It closes with a vertically brushed Grade 5 titanium pin buckle with shiny bevels, engraved YEMA.
42mm
CALIBER
Flying Tourbillon CMM.32
-3/+7 seconds accuracy
105h power reserve
Hours, minutes, seconds, sidereal time
CASE & CRYSTAL
Material: Titanium Grade 5 with vertically brushed flanks and lugs, circular-brushed and polished bezel
Diameter: 42mm
Thickness: 12.15mm
Lugs: 21mm
1.60mm double dome sapphire crystal
DIAL & HANDS
Deep black PVD coated, fine sandblasted grained dial
3D dial numerals, tracks, hands and celestial disc treated with Super-LumiNova BGW9 Grade X1
STRAP
Black leather strap with matching black stitching and Grade 5 titanium pin buckle with shiny bevels
CROWN
Push-pull crown in Grade 5 titanium with embossed YEMA logo
WATER RESISTANCE
10 BAR / 100 m / 330 feet
LOCAL PRODUCTION
Over the past few years, YEMA has made significant investments aimed at insourcing a good part of its production and constantly improving the quality of its manufacturing processes by implementing latest equipment as well as expanding and modernising its workshops and production lines.
In addition, YEMA now works with new local partners in France and Switzerland within a range of 72km of its workshops, to secure a more responsible and higher quality production.
MOVEMENT COMPONENTS
All tourbillon movement components, including the watch case, dial, and hands, are manufactured in France and Switzerland within a range of 72km from Morteau by recognized craftsman in fine watchmaking. The caliber bridges and mainplates are manufactured in YEMA’s workshops in Morteau where final assembly of all components takes place.
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COMPONENTS
ORIGIN
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Movement Design
Switzerland
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Movement Components
France + Switzerland
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Case, dial, hands
Switzerland
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Assemblies
France
A DYNAMIC REGIONAL WATCHMAKING ECOSYSTEM
YEMA workshops are based in Morteau, the cradle of French watchmaking, a few steps from the Swiss watchmaking region. This cross-border watchmaking community concentrated along the Jura mountains has gradually transformed into a true regional watchmaking ecosystem recognized as Intangible Cultural Heritage by the UNESCO in 2020.
Each watch is delivered in an elegant wooden case with a personalised International Warranty card.
In our commitment to quality, all timepieces equipped with a mechanical YEMA Manufacture movement enjoy an extended International Warranty period of 5 (five) years.
With your first purchase you become a member of YEMA's loyalty program YEMA Privilege. Enjoy exclusive offers and discounts that increase in value as you move up the tiers, free shipping, 24/7 Customer Service and 5 Years International Warranty.
DISCOVER
Each watch is delivered in an elegant wooden case with a personalised International Warranty card.
In our commitment to quality, all timepieces equipped with a mechanical YEMA Manufacture movement enjoy an extended International Warranty period of 5 (five) years.
With your first purchase you become a member of YEMA's loyalty program YEMA Privilege. Enjoy exclusive offers and discounts that increase in value as you move up the tiers, free shipping, 24/7 Customer Service and 5 Years International Warranty.
DISCOVER