Center Second
99.ZS (1) ST
The Case
polished / burnished, double screw union • diameter 42 mm • height 12.5 mm • 1.6 mm sapphire glass on top, slightly domed and antireflected inside • screwed sapphire glass base • oversized crown with embossed manufactory name solid nickel-free stainless steel, polished / burnished
The Dial
central display of hours, minutes and seconds sterling silver with the grained, silky matte finished surface of historical deck watches • numerals and indexes with black print
The hands
steel, hand-polished and heatblued
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The Movement
diameter 37 mm • height 5,4 mm • 20 rubies • central seconds driven by eccentric second wheel • intermediate wheel and seconds pinion below a separate bridge • seconds stopp • power reserve 50 hours (± 5%) • 18,000 semi-oscillations per hour • red gold plated three-quarter plate with yellow gold plated engraving of manufactory name and Geneva stripe finish • grained yellow gold seconds pinon bridge with bevelled edges and yellow gold serial number • retracing ratchet • double sunburst finish on crown wheels • Screws flat polished, heat-blued, with bevelled edges • Glucydur screw balance with Nivarox-1-spring • swan-neck fine adjustment on the hand-engraved balance cock