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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsYEMA’s 2023 75th-anniversary Yachtingraf Tourbillon Mareographe pairs a hand-wound, 60-second tourbillon with a mechanical indicator for the repeating lunar tide cycle. Offered in stainless steel and bronze, it brings a high-end movement complication to the colorful, sport-inspired Yachtingraf design—but its mareographe indicates a cycle; it does not forecast local tides in real time.
What is the Yema Yachtingraf Tourbillon Mareographe?
Introduced for YEMA’s 75th anniversary in 2023, the Mareographe is a limited-edition watch that combines two unusual features: a tourbillon and a mechanical tide-cycle display. Fratello and Monochrome reported two versions, stainless steel and bronze, each produced in a numbered run of 75 pieces. Fratello’s launch report and Monochrome’s November 2023 coverage describe the anniversary editions.
The dial draws on 1970s Yachtingraf models, according to YEMA’s official Japanese product page: a black sunray dial, applied Super-LumiNova markers, a colorful tide register and an opening that reveals the rotating tourbillon. A rotating 60-minute bezel reinforces the sporting look. These design and specification details do not, by themselves, establish suitability for a particular sailing or diving activity.
How does the Yema mareographe tide indicator work?
The upper subdial’s hand tracks a repeating lunar tide cycle. Fratello and Time and Watches give the complete cycle as approximately 12 hours, 25 minutes and 15.79 seconds; the interval from a high-tide position to a low-tide position is about 6 hours, 12 minutes and 7.89 seconds. The hand’s position is an indication of cycle timing, not a reading from a tide sensor.
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#1 Best Overall
- 2025 Inaugural Year of World Glacier Day, Agelocer called for greater public attention and participation in addressing climate change. Swiss Chief Designer Etienne Ruffieux grand launch the 'Never-Melting Ice 2.0' fully transparent crystal case free-sprung balance Tourbillon Watch, This timepiece was awarded the French National Design Award for its outstanding design and is available in a limited edition of 299 pieces worldwide.
- The watch features a sapphire crystal glass face and an Agelocer-exclusive K9 crystal case with 95% light transmittance. Treated with annealing hardening and silicon carbide Deposition technology, it achieved a hardness of Mohs 8. This exceptional hardness prevents scratches, ensuring the watch remains pristine over time. The crystal case's high transparency allows for a clear view of the exquisite mechanical artistry of the skeletonized flying tourbillon.
- Independently developed CAL9001 free-sprung balance flying tourbillon movement, manual winding, 28,880 vibrations per hour, 25 ruby bearings. Features high-end finishing including satin brushing and beveled edges, engraved brand logo with gold-stamped. Dual mainspring series technology delivers 80-hour power reserve (twice that of standard tourbillon movements). This technology ensures more uniform and gradual mainspring release, resulting in enhanced timekeeping precision and stability.
- The CAL9001 tourbillon movement features the exclusive free-sprung micro-adjustment technology typically reserved for luxury timepieces. This free-sprung system eliminates the need for a balance spring regulator, thereby overcoming the timing inaccuracies caused by regulator displacement in conventional mechanical movements. This ensures the watch delivers enhanced precision and stability in timekeeping.
- The watch is water-resistant to 50 meters. It features a food-grade translucent silicone strap with a butterfly double-push buckle, offering waterproof, sweatproof, and corrosion-resistant properties for comfortable and durable wear. Featuring Super-LumiNova Luminous hands and hour markers. We provide a three-year worldwide warranty.
The indication must be aligned with local time. It is not location-aware and cannot account for local coastal conditions or provide a live tide forecast. For actual tide times, use a current, location-specific tide source rather than relying on the watch’s repeating mechanical cycle. See Time and Watches’ October 2023 description of the mareographe.
What movement does it use?
The watch is powered by YEMA’s CMM.30, or Calibre Manufacture Morteau 30, a manually wound movement with a 60-second tourbillon. Movement designer Olivier Mory is credited in the 2023 launch coverage. YEMA says the bridges and mainplate are manufactured in its Morteau workshop, where the movement is also assembled, adjusted and inspected; Monochrome describes the broader parts mix as French and Swiss. That is not a claim that every component is made in France.
Rank #2
- This tourbillon crafted by Swiss chief designer Etienne Ruffieux with modern architectural aesthetics, features a lightweight, comfortable, free-sprung balance flying tourbillon. It houses an independently developed architectural tourbillon movement adorned with oversized ruby bearings. The design aesthetic is expressed through the interplay of light and shadow created by its extreme skeletonization. The watch has been honored with the IAI Global Design Award for its outstanding original design.
- Independently developed CAL9001 free-sprung balance flying tourbillon movement, manual winding, 28,880 vibrations per hour, 25 ruby bearings. Features high-end finishing including satin brushing and beveled edges, engraved brand logo with gold-stamped. Dual mainspring series technology delivers 80-hour power reserve (twice that of standard tourbillon movements). This technology ensures more uniform and gradual mainspring release, resulting in enhanced timekeeping precision and stability.
- The CAL9001 tourbillon movement features the exclusive free-sprung micro-adjustment technology typically reserved for luxury timepieces. This free-sprung system eliminates the need for a balance spring regulator, thereby overcoming the timing inaccuracies caused by regulator displacement in conventional mechanical movements. This ensures the watch delivers enhanced precision and stability in timekeeping.
- This tourbillon measures 40mm in diameter and just 9.7mm in thickness, weighing a mere 67 grams. Its meticulously engineered structure and radically skeletonized tourbillon movement eliminate all superfluous metal components, allowing the mechanical artistry of the free-sprung flying tourbillon to shine in its purest form. It is an exquisite, high-end tourbillon watch that is both ultra-thin and supremely comfortable.
- The watch is water-resistant to 50 meters, featuring a double-sided sapphire crystal and an Italian leather strap with hand-stitched detailing for comfortable and durable wear. We offer a three-year worldwide warranty.
YEMA and the launch articles state a 105-hour power reserve. Monochrome lists 19 jewels, 130 components, a frequency of 21,600 vibrations per hour, shock resistance to 5,000 G and magnetic-field resistance up to 2,000 gauss as published specifications, not independent test results.
Published accuracy figures differ: Fratello and Monochrome give -3/+7 seconds per day, while YEMA’s Japanese product page gives -3/+10 seconds per day. The available sources do not resolve that difference.
Rank #3
- The sporty, free-sprung balance flying tourbillon watch, crafted by Swiss chief designer Etienne Ruffieux with modern architectural aesthetics, features an independently developed architectural tourbillon movement adorned with oversized ruby bearings. Its design philosophy is expressed through the interplay of light and shadow created by extreme skeletonization. This timepiece has been honored with the European International Design Award for its outstanding original design.
- Independently developed CAL9001 free-sprung balance flying tourbillon movement, manual winding, 28,880 vibrations per hour, 25 ruby bearings. Features high-end finishing including satin brushing and beveled edges, engraved brand logo with gold-stamped. Dual mainspring series technology delivers 80-hour power reserve (twice that of standard tourbillon movements). This technology ensures more uniform and gradual mainspring release, resulting in enhanced timekeeping precision and stability.
- The CAL9001 tourbillon movement features the exclusive free-sprung micro-adjustment technology typically reserved for luxury timepieces. This free-sprung system eliminates the need for a balance spring regulator, thereby overcoming the timing inaccuracies caused by regulator displacement in conventional mechanical movements. This ensures the watch delivers enhanced precision and stability in timekeeping.
- This tourbillon features a high-tech ceramic bezel. Ceramic resists discoloration and is harder than metal, protecting the watch from scratches. Weighing half as much as stainless steel, it reduces wrist strain for enhanced comfort.
- The watch is water-resistant to 50 meters. Featuring a double-sided sapphire crystal and an aerospace-grade fluororubber strap, it offers waterproof, sweat-resistant, and corrosion-resistant properties for comfortable and durable wear. Featuring Super-LumiNova Luminous hands and hour markers. We provide a 3-year worldwide warranty.
What are the case dimensions and specifications?
| Specification | Published detail |
|---|---|
| Diameter | 42.5 mm |
| Thickness | 12.3 mm for the case; 14.5 mm including the domed sapphire crystal |
| Water resistance | 100 m / 10 bar, as stated in launch specifications |
| Bezel | Unidirectional, with a sapphire insert and 60-minute scale |
| Strap | 20 mm FKM rubber |
| Movement | Hand-wound CMM.30, 60-second tourbillon |
| Power reserve | 105 hours, as stated by YEMA and launch coverage |
The thickness figures use different measurement bases: the 14.5 mm total includes the domed crystal, whereas 12.3 mm is the case height. The dimensions and water-resistance rating were reported in 2023 by Fratello and Monochrome.
What is the difference between the steel and bronze versions?
| Version | Reference | Case material and character | Production |
|---|---|---|---|
| Stainless steel | 37.33.66.SN.U6 | Steel case, for a conventional stainless-steel appearance | 75 numbered pieces |
| Bronze | 37.33.66.ZN.U6 | Bronze case, for buyers who prefer bronze’s changing appearance and patina | 75 numbered pieces |
The two editions share the core movement and feature set in the launch descriptions; the sources do not establish a mechanical advantage for either material. Case material and appearance are the clear distinction. Both were announced with matching case hardware and a rubber strap; consult the individual edition details for clasp material. The references and limited runs were reported by Fratello and Monochrome in 2023.
Rank #4
- This tourbillon crafted by Swiss chief designer Etienne Ruffieux with modern architectural aesthetics, features a lightweight, comfortable, free-sprung balance flying tourbillon. It houses an independently developed architectural tourbillon movement adorned with oversized ruby bearings. The design aesthetic is expressed through the interplay of light and shadow created by its extreme skeletonization. The watch has been honored with the IAI Global Design Award for its outstanding original design.
- Independently developed CAL9001 free-sprung balance flying tourbillon movement, manual winding, 28,880 vibrations per hour, 25 ruby bearings. Features high-end finishing including satin brushing and beveled edges, engraved brand logo with gold-stamped. Dual mainspring series technology delivers 80-hour power reserve (twice that of standard tourbillon movements). This technology ensures more uniform and gradual mainspring release, resulting in enhanced timekeeping precision and stability.
- The CAL9001 tourbillon movement features the exclusive free-sprung micro-adjustment technology typically reserved for luxury timepieces. This free-sprung system eliminates the need for a balance spring regulator, thereby overcoming the timing inaccuracies caused by regulator displacement in conventional mechanical movements. This ensures the watch delivers enhanced precision and stability in timekeeping.
- This tourbillon measures 40mm in diameter and just 9.7mm in thickness, weighing a mere 67 grams. Its meticulously engineered structure and radically skeletonized tourbillon movement eliminate all superfluous metal components, allowing the mechanical artistry of the free-sprung flying tourbillon to shine in its purest form. It is an exquisite, high-end tourbillon watch that is both ultra-thin and supremely comfortable.
- The watch is water-resistant to 50 meters, featuring a double-sided sapphire crystal and an Italian leather strap with hand-stitched detailing for comfortable and durable wear. We offer a three-year worldwide warranty.
How much did it cost, and is it still available?
At launch in 2023, Fratello reported a price of US$9,990 excluding taxes, while Monochrome reported EUR 9,990. These are historical launch prices in different currencies and markets, not current quotes. Fratello said in October 2023 that shipping was expected to begin in January 2024; that forecast does not establish present stock.
Current availability, current pricing and secondary-market value are not established by those launch reports. Check with YEMA or an authorized retailer for current inventory and a region-specific price.
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