Bulgari Octo Finissimo Ultra Watch
Often times case diameter is the key measurement of a watch. In the case of the Bulgari Octo Finissimo Ultra, it's case thickness — or the lack thereof. The world's thinnest watch, it measures just 1.80 mm thick, with a case and integrated, 1.50 mm-thick bracelet made from sandblasted titanium and a tungsten carbide case back that doubles as the main plate. Separate hour and minute subdials sit in separate cut-outs on the right side, while the mainspring barrel has an etched QR code that serves as both decoration and to give the owner access to an NFT linked to their specific watch. The manually-wound masterpiece is limited to just 10 examples worldwide.