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.

The next time we saw the constant-force tourbillon was in the 2013 Ingenieur Constant-Force Tourbillon. Now this watch had the IWC caliber 94800 fitted inside, which would seem to have been developed from the base module of the 94900. Obviously, minus the astronomical module and with the sidereal time on the dialside replaced with IWC’s proprietary double moon phase indication mechanism. That movement — the 94800 — we now find again in the Portugieser Constant-Force Tourbillon. A, somewhat, sober version of the Portugieser Sidérale Scafusia.

The Portugieser Constant-Force Tourbillon does, however, still retain some of the Sidérale Scafusia’s customizability options. These include two case material choices — platinum and red gold — and four dial choices per case type. Further personalization include, caseback engravings (within IWC’s corporate guidelines) and lastly, an endless array of custom leather straps courtesy of IWC’s partnership with Santoni.

From your first point of contact with the brand, to initiate your made-to-order Portugieser Constant-Force Tourbillon, to delivery, the entire process is said to take just about three months. For more information, get in touch with the IWC retail concierge here.

IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon
IWC Portugieser Constant-Force Tourbillon

Technical Specifications

Movement

IWC Manufactured Calibre 94800, manual wound movement; hours and minutes; power reserve display (96 hours); double moon phases for the northern and southern hemisphere; tourbillon with constant-force mechanism built into tourbillon cage

Case

46mm; red gold or platinum;

Strap

Santoni alligator leather strap with folding clasp

IWC Portugieser Constant-Force Tourbillon

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