With this new timepiece, IWC has integrated a moon phase display into a Portofino Hand-Wound Eight Days watch for the first time. The watch is a tribute to the Reference 5251 from 1984, another timepiece that was equipped with this complication.
The Portofino Hand-Wound Moon Phase houses the manufactured 59800 calibre, which beats at a frequency of 28,800 A/h. IWC watch designers enhanced the basic 59000 calibre with a moon phase module that only needs to be adjusted by one day after 122 years.
The watch with a case diameter of 45 millimetres is available in two versions, both of which have gold-plated hands. The first version has an 18-carat red gold case, a slate-coloured dial and solid gold appliqués (Ref. IW516403), while the second one has a stainless-steel case, a silver-plated dial and gold-plated appliqués (Ref. IW516401). Both models are fitted with a dark brown alligator leather strap by Santoni.
Ref. 516403
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