Since 2009, the Double Rotor has been given a fresh interpretation, with the upper rotor being replaced by a large titanium 12-blade wheel inspired by a gas turbine. The Turbine covers the entire surface, while its rotation is entirely free and has no effect on the automatic winding. The focus is firmly placed on aesthetic appeal and the watches in the Turbine genre offer a wealth of delightful visual effects. P-331 / In-house caliber TURBINE Collection specifications Movement Mechanical automatic P-331 / In-house caliber Function Central hands indicating hours, minutes and seconds Vibrations per hour 28,800 (4 Hz) Autonomy in hours ( fully wound up) 42 hours Number of rubies 25 jewels Case Case Ø 44 mm Case thickness 13 mm Crystal Glareproofed sapphire crystal on both sides Caseback See-through caseback Water-resistance 5 ATM Bracelet Buckle Folding clasp with push-buttons Width of strap ( lugs / buckle ) 25 / 20 mm Other feature Turbine on the dial side * PVD (Physical Vapor Deposition) coating The PVD coating used by Perrelet is a high technology coating made by ion bombardment in vacuum. It is a 2-micron thick layer of carbon that has a very high wear resistance and antifriction coefficient. Its hardness offers at the same time a silky aspect particularly adapted to the Perrelet product line. 40 | TRADE CATALOGUE 2014 - 2015
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