This upcoming year marks the 150th anniversary of IWC Schaffhausen and such an occasion demands a series of commemorative timepieces. We just recently reviewed the “Tribute To Pallweber” and now we’re delighted to take a closer look at the “Portugieser Perpetual Calendar Tourbillon” and the “Portugieser Perpetual Calendar Tourbillon”.
Even after a century and a half there is still room for novelty at IWC as they roll out their first ever watch to combine a perpetual calendar with a tourbillon on the dial! It comes on a 45mm case made out of 18k rose gold with a transparent case back, which allows to view the inner workings of the mechanical movement. Equipped with a stubby knurled crown, on a charismatic Portugieser-style case that features short and curved lugs. Water-resistance on this watch can reach up to 30 meters (98 feet).
Time is exhibited on a white dial with a lacquered finish and 18k rose gold Arabic numerals, followed by smaller black printed railroad-motif minute index markers. There are three sub-dials: the calendar days and power-reserve are combined in one sub-dial with two hands at the 3 o’clock position; the months of the year and Moonphase are combined in to one sub-dial at the 6 o’clock position; and the last sub-dial hew the day of the week at the 9 o’clock position. To complete the perpetual calendar, the current year is in an aperture between the 7 and 8 o’clock position. The tourbillon is exposed in all its glory at the 12 o’clock position.
IWC Portugieser Perpetual Calendar Tourbillon Edition 150 Years
This “IWC Portugieser Perpetual Calendar Tourbillon Edition 150 Years” (Ref#: IW504501) is powered by a self-winding mechanical movement, caliber 51900 with 44 jewels and 19,800 vph. Equipped with the ingenious 82-part perpetual calendar module developed by Kurt Klaus and a special commemorative 18k gold rotor that can be seem thru its exhibition caseback. Power reserve o this watch can last up to 168 hours (7 days), when fully wound.
Mounted to the watch is a black Santoni alligator strap with large scales, secured to the wrist by an 18k rose gold deployment buckle. This is a limited watch with only 50 manufactured pieced. For further information visit the official IWC website here.
MSRP: $110,000.00 USD
On the next model up we have a slightly bigger 46mm case made out of platinum, also bearing all the standard curves and angles of the Portugieser casing IWC has accustomed us to. In essence this watch is an updated version of the previous “Constant-Force Tourbillon” watch (released in 2013), combined here with the novel “perpetual moon phase” display.
Video courtesy of: IWC
The original model came equipped with a 94800 caliber, but this updated version has added enough variation that it was designated caliber 94805. This time around IWC has installed a second escapement wheel and a balance spring ensuring constant force is applied. It’s also reminiscent of what we saw on the “IWC Siderale Scafusia” (Ref#: 5041), but this new tourbillon has been decorated with an open-worked, cross-shaped bridge. Water-resistance on this watch can reach up to 30 meters (98 feet).
Time is exhibited on a white lacquered dial with large black Arabic numerals printed with the signature fonts typically seen on the Portugieser models, followed by smaller black printed railroad-motif minute index markers. There are two sub-dials a Moonphase in between the 1 and 2 o’clock positions and a power reserve indicator in-between the 4 and 5 o’clock positons. The central hands are a distinct heat treated blue hue.
Finally the main allure of this piece is found in the form of its tourbillon movement, which features a constant-force mechanism that delivers power in even impulses to the escapement. By doing so there should be a significant improvement to the chronometric performance of the movement. It also contains a blue hand hovering over it as a sub-seconds counter. A worthy upgrade to previous IWC iterations of this complication.
IWC Portugieser Constant-Force Tourbillon
This “IWC Portugieser Constant-Force Tourbillon Edition 150 Years” (Ref#: IW590202) is powered by a hand-wound mechanical movement, caliber 94805 with 41 jewels and 18,000 vph. The patented constant force mechanism is integrated into the tourbillon, ensuring a stable amplitude of the balance, which is visible through the 1 second jumps of the tourbillon. Power reserve on this watch can last up to 96 hours (4 days), when fully wound.
Mounted to the watch is a black alligator Santoni strap with large scales, while secured to the wrist by a platinum deployment buckle. This is a limited edition watch with only 15 manufactured pieces. For further information visit the official IWC website here.
MSRP: $253,000.00 USD
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