IWC made a new addition to their Portugieser collection over the week with the Portugieser Constant-Force Tourbillon. Think back to the first watch, where we saw IWC’s constant-force tourbillon — the Portugieser Sidérale Scafusia — a watch that mixed the brand’s technical reach with its particular formula for customizability.
But that creation was quite the special timepiece, which bore a perpetual calendar — with leap year display and absolute day of the year — a celestial chart showing horizon, ecliptic and celestial equator, display of day, night and twilight, plus sunrise and sunset on its caseback.
All of this was created specific to the customer’s desired location, accurate to 20 meters of the exact location. The movement in question — the IWC caliber 94900 — was essentially the pairing of a base module with an added module that brought the astronomical indications into the watch.