The Bulgari Octo Finissimo Skeleton, introduced in March of 2019, is a record-setting timepiece; the world's thinnest of its kind in 2017. Its case measures 40mm across and only 5.15mm high. The watch is powered by a ultra-slim manufacture movement with manual winding, just 2.23mm thick, with power reserve to 60 hours. You can admire the astonishing movement through the sapphire case back. It features a black ceramic case with skeleton dial and matching bracelet.