Watch Facts

Quiz: 2024.06.02 Quiz (Astronomy)

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BOVET 1822 RÉCITAL 20 ASTÉRIUM (2023)

BOVET 1822 RÉCITAL 20 ASTÉRIUM (2023). White Gold and Red Gold case, 46mm diameter, 18.3mm thickness, leather strap with pin buckle, water resistance up to 30 meters. Manual-winding mechanical movement with a 240-hour power reserve. Functions include hours, minutes, seconds, date, day, month, power reserve indicator, retrograde minutes, tourbillon, equation of time, and a special escapement. Annual calendar tracking summer and winter equinox. Reference: R20N005/1/PU. Launched in October 2022, part of the Dimier collection, limited to 1 piece. Priced at 532,432 CHF.  This watch is the winner of the Calendar & Astronomy prize at the 2023 GPHG

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Vacheron Constantin Les Cabinotiers Celestia Astronomical Grand Complication (2017)

Les Cabinotiers Celestia Astronomical Grand Complication 3600 watch, 23 astronomical complications and two dials. This project took 5 years to develop from scratch, the movement has 514 components at JUST 8.7mm! More impressive is that it has a 3 weeks power reserve (6 barrels). Perpetual calendar, age of moon, sun rise sun set, running equation of time, tide level, sun earth moon conjunction, celestial chart, Tourbillon just to name a few.  Size 45mm in 18k white gold. Unique Piece

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JAEGER-LECOULTRE Master Hybris Artistica Calibre 945 Atomium (2022)
  • Case is in 18k white gold at 45mm with a thickness of 16.05mm, celestial dial with grisaille enamel, silver metal filigree outer dome, sapphire display caseback. There are three rings on the dial that shows the solar time, the most inside ring shows 24 hours, the outer ring shows the minute and the middle ring is the hour ring. The watch is a flying tourbillon that also display sidereal time, the celestrial dial with star chart shows the constellations in the northern hemisphere, also a zodiac calendar and a minute repeater. The movement is a manual winding in-house calibre 945, many patented innovations in this movement including the trebuchet hammer and the governor.
  • Power reserve is 40hrs
  • Limited to 5pcs – Priced 450k€
  • Collection 2022
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Piaget Altiplano Ultimate Concept Constellation Unique Piece (2022)
  • The winner of the GPHG Aiguille d’Or prize in 2020, the watch celebrates its creation and birth with this unique piece. The dial features the celestial settings on the moment the AUC is conceived – February 7th 2017 at La Côte-aux-Fées. This horology special moment was also inscripted at 2:30 position.  To make is even more special, the celestial sky is created throughout the dial of the watch using superluminova, so when the room is dark, you can see the exact skies on that day.  Of course, the case is still using the 41mm cobalt ally with dark slate blue PVD plate.
  • Unique Piece
  • Collection 2022
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A. Lange & Söhne Tourbograph Perpetual ‘Pour Le Mérite’ (2017)

Perpetual calendar, Tourbillon, split second chronograph, astronomical moon-phase and a movement that uses fusée and chain. This is the holy grail Lange. Lange caliber L133.1, hand-wound with 36 hour power reserve, 684 components. Platinum PT950 case in 43mm. Limited to 50pcs, priced at 480,000.00€

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Arnold & Son HM Perpetual Moon (2013)

Astronomical moonphase, meaning the moonphase is very accurate. How accurate? With only one day of deviation every 122 years! Many people say, why is it necessary? And how would I know if it’s really 122 years – I won’t live to see it! All these accuracy can be proven mathematically. (Much like the perpetual calendar) Hand wound AS1512 movement, 5N Red gold 42mm case, 90hr power reserve, priced at CHF 25,500.  Launched in 2013

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DeBethune DB17 Perpetual Calendar (2005)

18k rose gold case in 43mm with a thickness of 12mm. Manual winding movement DB2004, using the inhouse patented 4 spoke titanium balance with platinum weights. Perpetual calendar with astronomical moonphase. Power reserve is 5 days. Several technical aspects make this a very interesting watch to collect; first of all a legible perpetual calendar is something not talked about more often enough. Many perpetual calendar on the market are simply impossible to read; this DB17 is very legible with a simplistic approach in dial design. Secondly, the moonphase is not only incredible because of its Astronomical Moonphase ability (meaning its accurate up to 122 years), but also it is a spherical moon, adding even more uniqueness to the watch. Produced in very small quantity in the early days of the brands’ launch.

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Audemars Piguet Royal Oak Ultra-Thin Perpetual Calendar (2018)

aka RD2 (2018). The case is in Platinum 41mm. Movement is automatic Caliber 5133, the thickness of this movement is at 2.89mm which is a world record of the thickness. Power reserve at 40hours. Two patents are new to this watch – No: 1 the end of the month cam is integrated to the day of the month wheel, standing now at the same level as the wheel. No2: the end of the month cam is integrated to the month wheel, standing now at the same level as the wheel, this allows to have the movement with less thickness. Concept watch No pricing info available for 2018

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Baume & Mercier Clifton Perpetual Calendar (2017)

Vaucher 5041 automatic movement, 48 hrs power reserve, 29jewels. 18K red gold case in 42mm. Perpetual calendar with moonphase, display sapphire caseback. One of my favorite this year. Priced at 20,800CHF

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Breguet Marine Équation Marchante 5887 (2017)

Three complications in this piece : equation of time, perpetual calendar and tourbillon. In house automatic Cal. 581DPE, 80 hours power reserve. 18K rose gold case at 43.9mm. Priced at USD 215,000.00

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