An elegant classic that is unmistakably Perrelet. The new First Class collection for him unveils a new version of the brand’s great classic, paying homage to traditional timepieces but with a contemporary twist. The 6 o’clock dial opening affords a privileged view of the balance wheel to enrich the dynamic perception of time. FIRST CLASS OPEN HEART P-391 / In-house caliber Collection specifications Movement Mechanical automatic P-391 / In-house caliber Function Central hands indicating hours, minutes and seconds Special feature Open see-through balance wheel Vibrations per hour 28,800 (4 Hz) Autonomy in hours ( fully wound up) 42 hours Number of rubies 25 jewels Case Case Ø 42.50 mm Case thickness 10.70 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 ) 20 / 18 mm 26 | TRADE CATALOGUE 2014 - 2015
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