IWC - a gentleman's Big Ingenieur Seven Day wrist watch. Numbered 3230854. Signed automatic calibre 51113. Black dial with luminous baton hour markers, Arabic twelve, subsidiary power reserve dial to three, date aperture to six. Stainless steel case with exhibition case back, fitted to a signed black crocodile strap with stainless steel pin buckle. 45mm. The Big Ingenieur seven day power reserve was discontinued in 2013 and so this is the last of its kind. While the 50000 series movements still beat away in other IWC collections, the sporting lines of the Ingenieur have returned to more modest proportions.