IWC – Portugieser Chronograph Classic – IW390403
You might refer to this chronograph from the Portugieser family as the big brother of Reference 3714: it is slightly wider and is 2 millimetres higher, although the latter is barely noticeable due to the arched-edge front glass. This traditional watch glass type lends the design a classic equilibrium; this is further emphasized by the railway track chapter ring central to the appearance of the ur-Portugieser. The Portugieser Chronograph Classic is equipped with the IWC-manufactured 89361 calibre. This was designed specifically to record stop times up to 12 hours in a subdial where they can be read off as simply as the time of day. The Reference 3904 is available in 18-carat red gold or stainless steel. Both models have a silver- or slate-coloured dial. The rotor, decorated with Geneva stripes, can be seen through the transparent sapphire-glass back. All models are supplied with a Santoni alligator leather strap.