Caliber 99.9
99.9 (GR) RG
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 18kt / 750 - rose gold, polished / burnished
The Dial
central display of minutes, hours and seconds • centrally positioned power reserve gauge visible through an inverted arch slot in the dial, located at 6 o’clock • engraved brass dial with the grained, silky matte finished surface of historical ship chronometers • engraving technique in the tradition of old precision pendulum clocks • black engraving
The hands
steel, hand-polished and heatblued
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The Movement
diameter 37 mm • height 5.4 mm • power reserve 50 hours (± 5%) • seconds stopp • 18,000 semi-oscillations per hour • red gold plated, grained three-quarter plate with yellow gold engraving of manufactory name • retracing ratchet • double sunburst finish on the crown wheels • Glucydur screw balance with Nivarox-1-Spring • swan-neck fine adjustment on the hand-engraved balance cock • central seconds driven by eccentric second wheel • intermediate wheel and seconds pinion below a separate bridge • grained yellow gold seconds pinon bridge with bevelled edges and yellow gold serial number • power reserve indicator by means of a specially developed bevel gear differential