The Portofino Hand-Wound Tourbillon Rétrograde (Ref. IW516501) is the first IWC Portofino model to feature a tourbillon, with the balance, pallet and escape wheel mounted in a cage that rotates around its own axis once every minute. This constant rotation helps to counteract the pull of gravity so that it does not adversely affect the watch’s rate and accuracy.
Model: Portofino Hand-Wound Tourbillon Rétrograde Ref. IW516501
Power reserve display
Retrograde date display
Flying hacking minute tourbillon at “6 o’clock”
IWC-manufactured calibre 59900 Mechanical movement
Frequency: 28,800 A/h | 4 Hz
Power reserve: 8 days (192 h)
Case, dial and strap
18-carat red gold case
Diameter: 45 mm
Height: 14 mm
Glass Sapphire, arched edge, antireflective coating on both sides
See-through sapphire-glass back
Water-resistant 3 bar
Silver-plated dial, gold-plated hands, solid gold appliqués
Dark brown alligator leather strap by Santoni
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