IWC Portuguese 3712

This manual wind round button Split-second chronograph Ref. 3712-02 combines the elegance of a nicely arranged dial with the technical mastery of a chronograph with split-second module. It has a diameter of 41 mm and with its domed sapphire crystal reaches a height of 12.3 mm. The manual wind movement Calibre C76240 is based on the ETA/Valjoux 7760 which originally has 17 jewels and is a 3-register chronograph movement but IWC has modified it to become a 27 jewels, straight-line lever escapement and a two counters chronograph with the sub-dials nicely arranged at 12 (30-minute chronograph register) and 6 o'clock (constant seconds instead of the chronograph 12-hour). It has a power reserve of 48 hours and pulsates 28,800 times an hour. The split-second push piece is at 10 o'clock. The real beauty of this time piece, apart from its modified movement, lies in its elegant dial. It is light champagne-colored and creates a sharp contrast to the case and hands; feuille hands for hours, minutes and continuous seconds are pink gold-plated. This make it easy to distinguish between normal and stopwatch times and the Arabic numeral hour markers are embossed. Only a small quantity of Ref.3712 were made, particularly in stainless steel, hence this watch always command good prices at international auctions. At a recent international auction, a similar watch was sold for US$8,000 (before the 25% commission). But I am offering my watch at a very good price of US$5,800 only. Watch was purchased at an international auction and has no factory certificate and boxes but I would provide an IWC service certificate. I also append here a picture of the Calibre C76240 taken from the auction house's catalogue for reference.