Share this article Jacob & Co. has brought its Astronomia down from the heavens for once with a one-of-a-kind vision of mortality. The Astronomia Skulls paints its macabre tableau using 45gm of 18k rose gold inside the watch’s vast 50mm showcase of a case and the end result represents something of a masterclass in hand engraving and polishing technique. The piled up skulls, with their ruby-set eyes, serve as one of the more luxurious representations of a theme that has remained popular throughout the course of human history and certainly during the centuries that horology has existed as a pursuit, that of Memento Mori, or ‘remember you die.’