IWC or the the "International Watch Co. Schaffhausen" was founded by an American engineer from Boston, Florentine Ariosto Jones, in Schaffhausen, Switzerland in the year 1868. IWC Schaffhausen is notable for being the only major Swiss watch factory located in eastern Switzerland, as the majority of the well-known Swiss watch manufacturers are located in western Switzerland
The IWC Portugeuse Chrono-Automatic is powered by the IWC Caliber 79350 movement. The Caliber 79350 is a self winding movement which produces 28,800 vibrations per hour and which has a 44 hour power reserve.
The face of the watch has two sub-dials. The one on top is used in conjunction with the main seconds hand to measure intervals of time of up to 30 minutes. The sub-dial below displays continues seconds. The pushers on the right side of the watch are the typical start/stop and reset buttons of a chronograph.
The watch has a 40.9 mm diameter case which is water resistant to 30 meters. The watch is available with white gold, rose gold and stainless steel cases, with complementing leather straps.