This exclusive Portugieser model combines a flying tourbillon with a retrograde date display and a chronograph.
ABOUT THE WATCH
Portugieser Tourbillon Rétrograde Chronograph
Only a few complications in Haute Horlogerie are as fascinating as the tourbillon. The "whirlwind" involves the balance wheel rotating around its axis in a cage. This not only provides a visual spectacle on the dial. The constant rotation reduces the influence of gravity on the oscillation system and increases the accuracy of the timepiece. The Portugieser Tourbillon Rétrograde Chronograph features a flying hacking minute tourbillon at "6 o'clock". Additionally, the model is equipped with a retrograde date display and a chronograph with flyback function. Limited to 50 pieces, the case of this watch is made of platinum. The silver-plated dial and the rhodium-plated hands and appliqués harmonise wonderfully with the rare precious metal. The self-winding IWC-manufactured 89900 calibre boasts a power reserve of 68 hours. The pallet lever and escape wheel are treated using Diamond Shell® technology, which reduces friction and improves the flow of energy in the movement.
Retrograde date display | IWC Schaffhausen
The retrograde date display shows the passing of the month with a date hand that moves in an arc from the 1st to the 31st of the month. After 31 days have passed, the spring is no longer under tension and allows the date hand to jump back to “one”. In months with fewer than 31 days or when the watch has not been used for a while, the date display can be advanced rapidly using the crown. This does not involve resetting the time.
Features
Case
Movement
Packaging
Rotor in 18-carat 5N gold
Sapphire glass, arched-edge, antireflective coating on both sides
Flyback function
Hour and minute counters combined in a totalizer at 12 o’clock
Chronograph function with hours, minutes and seconds
Hacking tourbillon mechanism
Flying minute tourbillon
Retrograde date display
Limited to
50
pieces
Case
Platinum
Case
Diameter
43.5
mm
Height
15.9
mm
Back case
See-through sapphire glass back
Water resistance
3.0
bar
Calibre
89900
Calibre
Movement type
Automatic winding,
IWC-manufactured movement
