{"reference": {"slug": "jacob-co-astronomia-sky", "brand": "Jacob & Co.", "ref": "AS900", "model": "Astronomia Sky", "case_material": "18k Rose Gold", "url": "https://mostexpensivewatches.net/reference/jacob-co-astronomia-sky", "description": "The Jacob & Co. Astronomia Sky AS900 in 18k rose gold was introduced in 2016 as a limited edition of 18 pieces. Collectors prioritize this reference for the JCAM11 caliber, a manual-wind movement featuring a triple-axis gravitational tourbillon, a rotating celestial vault, and a three-dimensional sidereal display. The 47mm case utilizes a sapphire crystal monoblock construction to provide visibility of the four-arm vertical movement, which includes a 288-facet Jacob-cut diamond and a magnesium globe. This reference marked a significant technical evolution for the brand by integrating astronomical complications with the rotating carousel architecture. On the secondary market, this model typically trades in the mid-to-high six-figure range, often between $400,000 and $600,000 depending on condition. A notable production detail is the celestial dial made of grade 5 titanium with 18k gold hand-engraved zodiac signs, which rotates once every sidereal year."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": []}