IWC Portugieser Chronograph Classic Red Gold IW3903-05

Bucherer, the Lucerne retailer, has run its Blue Editions with 11 watch manufacturers, and this IWC was the 18th watch in the series, sold only in Bucherer boutiques in Europe. Red gold hands and hour markers sit on the blue dial. Inside is IWC's manufacture calibre 89361, a self-winding flyback chronograph with a 68-hour power reserve.

The case is the same 42 mm red gold Chronograph Classic as the regular IW3903-01, which pairs it with a silver dial. In steel the closest match is the IW3903-03, also with a blue dial. The Portugieser Chronographs of the IW3716 series are a smaller watch at 41 mm and 13.1 mm thick.