IWC’s latest Haute Horlogerie creation, the Portugieser Tourbillon Rétrograde Chronograph (Ref. 3940) combines a flying minute tourbillon at 6 o’clock with a retrograde date display at 9 o’clock and a flyback chronograph. The model is available in two versions, both limited to 50 watches.
One is housed in an 18-carat Armor Gold® case with a blue dial featuring the maritime inspired design cues of the Boutique Editions. Thanks to its improved microstructure, this innovative new material has considerably higher hardness values than traditional 5N gold alloys. A second version is available in platinum.
The IWC-manufactured 89900 calibre is self-winding and builds up a power reserve of 68 hours. The chronograph displays stopped hours and minutes in a single totaliser at 12 o’clock.
Thanks to its hacking tourbillon, the watch can be stopped completely, allowing the time to be set with down-to-the-second accuracy. The pallet lever and escape wheel are treated with Diamond Shell® technology, giving it an extremely hard surface that reduces friction and improves the flow of energy in the movement.
Model: Portugieser Tourbillon Rétrograde Chronograph (Ref. IW 3940)
Flying hacking minute tourbillon at 6 o‘clock
Retrograde date display
Stopwatch function with hours, minutes and seconds
Hour and minute counter combined in a totaliser at 12 o‘clock
IWC manufacture calibre 89900
Mechanical chronograph movement
Frequency: 28,800 vph/4 Hz
Power reserve: 68 h
18-carat gold oscillating weight
Case, dial and strap
– Ref. IW394005: 18-carat Armor Gold® case, blue dial, gold-plated hands, 18-carat gold appliques, 18-carat gold oscillating weight, blue alligator leather strap by Santoni
– Ref. IW394006: Platinum case, silver-plated dial, rhodium-plated hands and appliques, 18-carat gold oscillating weight, blue alligator leather strap by Santoni
Glass: Sapphire, arched edge, anti-reflective coating on both sides
Water-resistant: 3 bar
Diameter: 43.5 mm
Height: 16 mm
Limited to 50 watches