The Jacob & Co. Astronomia Solar turns a mechanical watch into a miniature moving tableau: rotating arms carry celestial imagery around a vertical display, making motion—not a conventional dial—the point of the watch. Its visual spectacle is matched by a complex movement, but published specifications and prices must be tied to the exact Solar configuration being discussed.
What the Astronomia Solar does
The Astronomia Solar is part of Jacob & Co.’s broader Astronomia family, but it has its own identity: a vertically arranged, animated display built around rotating arms and celestial motifs. Rather than presenting time through a conventional set of hands over a flat dial, the watch makes the movement of its components part of what the wearer sees.
That architecture gives the watch its theatrical character. The eye is drawn to the orbiting elements and their changing positions, so the experience is less about reading a glanceable dial and more about watching a mechanical scene unfold. Hodinkee’s 2017 hands-on coverage describes the Solar’s JCAM19 caliber and reports 447 movement components, excluding gemstones. Read Hodinkee’s Astronomia Solar hands-on.
Construction and movement: specifications depend on the variant
One specifically documented configuration is the Astronomia Solar Zodiac, reference AS310.21.SP.AA.A. Jacob & Co.’s UK listing describes that watch as manually wound, with a JCAM19 movement containing 447 components. The listed figures below apply to this named Zodiac reference; they should not be assumed to describe every Astronomia Solar configuration.
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- Elegant & Functional Design: This Glenaw men's automatic watch features a sophisticated dial with a complete calendar (day, date, month) and a moon phase display. The luminous hands ensure readability, while the stainless steel bracelet with a butterfly clasp offers a secure and comfortable fit.
- Precise Self-Winding Movement: Powered by an automatic mechanical movement, this watch winds itself with the motion of your wrist, eliminating the need for batteries. It provides accurate timekeeping and showcases intricate engineering.
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| Specification | Solar Zodiac AS310.21.SP.AA.A |
|---|---|
| Movement | Manual-winding JCAM19 |
| Components | 447, according to Jacob & Co.’s UK listing |
| Power reserve | 48 hours, according to Jacob & Co.’s UK listing |
| Frequency | 28,800 vibrations per hour (4 Hz), according to Jacob & Co.’s UK listing |
| Case diameter | 44 mm, according to Jacob & Co.’s UK listing |
| Case height | 21 mm, according to Jacob & Co.’s UK listing |
| Case material and construction | Black DLC titanium with sapphire side apertures, according to Jacob & Co.’s UK listing |
| Water resistance | 30 m (3 atm), according to Jacob & Co.’s UK listing |
| Edition | 18 pieces, according to Jacob & Co.’s UK listing |
Jacob & Co.’s UK listing for the Solar Zodiac provides the reference-specific details. The 44 mm diameter and 21 mm height describe a substantial case; the listing’s water-resistance rating is a specification, not an invitation to treat this elaborate watch as a tool for swimming or diving.
Price: separate the historical hands-on figure from the Zodiac listing
Hodinkee’s 2017 article gave a price of $280,000 “as shown.” That is a historical publication-era figure for the configuration pictured in that article, not a current quote and not necessarily the same watch as the Solar Zodiac reference.
Rank #2
- ⌚【Automatic Watches for Men】Watch Case Diameter 43mm, Case Thickness:15mm,Strap Width:22mm;The dial has a blue starry sky. The self-winding movement does not require batteries. The small earth in the watch will rotate by itself and rotate with the movement of the movement.
- ⌚【Mechanical Watches】Operate without battery, automatic self-winding. However, proper manual winding is indispensable,which can effectively reduce time deviation. (⚠Note: Mechanical watch is different from quartz watch. Insufficient mechanical kinetic energy will cause the watch to stop, please winding it in time.)
- ⌚【30M Waterproof 】30 M Waterproof Watch:Handwash,swimming, no problem ! NOTE: Please Do Not press any buttons in the water or wear this watch for longtime underwater activities such as diving, ect.
- ⌚【Gifts for Men】This watch is well packaged in a stylish and luxurious black watch box,is a great gift choice as a business and party present, you can also generously give this men watch as a gift on Valentine's Day, Christmas, Thanksgiving, parties, Father's Day，anniversaries or other holidays.
- ⌚【100% After-sales Service Guarantee】Purchase without Worry. We offer a 90-day money-back guarantee for any reason.If you have problems during use of the wristwatch, please don't hesitate to contact us. We will offer you professional service
Jacob & Co.’s UK page displays £343,500 for Solar Zodiac reference AS310.21.SP.AA.A. The page does not state a publication date for that price, and displayed prices can change; treat it as the listing’s stated price for that specific variant rather than a universal Astronomia Solar price.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Keep the Astronomia names distinct
Astronomia is a family, not a single specification set. Solar, Solar Zodiac, Tourbillon, Sky and Art are distinct named models or configurations; a movement or case detail documented for one should not be carried over to another without a source for that exact watch. Jacob & Co.’s official Astronomia Art page, for example, describes a separate non-spinning model with caliber JCAM25, not the Solar’s JCAM19. See Jacob & Co.’s Astronomia Art page.
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Rank #4
- On the Ptolameic Watch, the sun is on the minute hand and the moon is on the hour hand and we are the center of the solar system once again.
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Rank #3
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
