The iwc portugieser with a 7 day power reserve is one of the brands most popular models the harmoniously designed dial is unsurpassed and the inner components are now made of wear resistant ceramic with two barrels which build up an incredible 7 day power reserve the watch has a stainless steel case with a transparent sapphire glass case back through which the swiss made precision automatic movement can be admired a black leather finishes this stunning iwc timepiece