The Hublot Big Bang Wally was made as part of a joint venture between Hublot and avant-garde Monaco based boat builder Wally. The watch is made of Hublonium which is a aluminum and magnesium alloy patented by Hublot which has a slightly yellowish hue and has light properties yet is very strong. The case also features resin, titanium and PVD coated stainless steel whilst the strap is made of natural rubber. The watch uses the Hublot caliber HUB4001 automatic movement with a carbon-tungsten and PVD coated rotor. Only five hundred of the watches will be made and will be available from Hublot stores.