Limited Edition of 18 Pieces. Angelus Watch U20 Ultra Skeleton Tourbillon Limited Edition 0TCAB.U01A. Angelus watches is a high end watch brand based in La Chaux de Fonds, the heart of Swiss watchmaking. Dating back nearly 125 years, Angelus has been one of the most influential horological manufactures of the last century. Connoisseurs of high end watchmaking have universally hailed Angelus pioneering, in house developed movements and timepieces, which continue to be coveted by collectors all over the world.