The iconic design, with its clean, open dial, two recessed totalizers and flange with quarter-second scale, remains unchanged. Inside the case of the much-loved chronograph, however, IWC now uses a high quality in-house movement from the 69000-calibre family, which can be seen through the transparent back.
The open, clean, functional dial, with two recessed totalizers at “6 o’clock” and “12 o’clock”, appliquéd Arabic numerals and slim feuille hands, is encircled by a filigree bezel. The flange, printed with a quarter-second scale, enables precision reading of stopwatch times and gives this timeless Portugieser a subtle, sporty touch.
Externally, the iconic design of the new models, which are grouped under Reference 3716, remains unchanged. The decisive new feature is hidden away inside the watch: the IWC-manufactured 69355 calibre ensures the precise display and measurement of time. The rugged, precision chronograph movement with the classic column-wheel design can be seen through the transparent back.
An automatic pawl-winding system builds up a power reserve of 46 hours. Six different versions are available in 18-carat 5N gold or stainless steel. The stainless-steel models are equipped with the newly developed butterfly folding clasp, which is particularly comfortable in wear.
Technical specifications
Mechanical movement – stopwatch function with minutes and seconds – small hacking seconds – see-through sapphire glass back
MOVEMENT IWC manufacture calibrer 69355 Frequency 28,800 vph / 4 Hz Jewels 33 Power reserve 46 h Winding Automatic
WATCH Materials: Ref. IW371604: Stainless steel case, silver-plated dial, gold-plated hands and appliques, black alligator strap, Ref. IW371605: Stainless steel case, silver-plated dial, blue hands and appliques, blue alligator leather strap, Ref. IW371606: Stainless steel case, blue dial, rhodium-plated hands and appliques, black alligator strap, Ref. IW371609: Stainless steel case, black dial, rhodium-plated hands and appliques, black alligator strap, Ref. IW371610: 18-carat 5N gold case, slate-coloured dial, gold-plated hands, 18-carat gold appliques, black alligator strap by Santoni, Ref. IW371611: 18-carat 5N gold case, silver-plated dial, gold-plated hands, 18-carat gold appliques, brown alligator leather strap by Santoni
Glass Sapphire, convex, antireflective coating on both sides
Water-resistant 3 bar
Diameter 41 mm Height 13.1 mm
