There are plenty of rare watches out there, but few are literally one-of-a-kind. Created for the Only Watch auction in 2011, this Louis Vuitton Tambour Diving Watch ($TBA; Auction) is crafted from 18K black gold, and features a black and orange design, a square button chronograph, counter, date, and an orange rubber strap. It comes encased in a custom Damier Graphite canvas presentation trunk, and includes additional black and orange alligator straps, as well as a certificate of authenticity.
Built to commemorate the 50th anniversary of a Heuer watch's first trip into space — aboard the wrist of John Glenn — the TAG Heuer Carrera 1887 SpaceX Watch ($5,800) pays tribute while looking to the future. It's based on the stanard 1887 Carrera, and features an in-house caliber 1887 movement, a white dial with custom anthracite hands and hour markings, a polished stainless steel case, a brown perforated leather strap, and a smoked-sapphire case back with the SpaceX logo and an illustration of the company's Falcon rocket and Dragon spacecraft. Limited to 2012 individually-numbered examples. [via]