Weltzeit Auf & Ab
99.10 A&A (GR) 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 local hours independently adjustable – central display of minutes and second - eccentric 24 Hour display at 6 o’clock – power reserve display at 12 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 – 20 rubies - power reserve of 50 hours (± 5%) - seconds stopp - 18,000 semi-oscillations per hour - red gold, grained plated three-quarter plate with yellow gold engraving of manufacturer 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 rose gold seconds pinon bridge with bevelled edges and yellow gold serial number - power reserve indicator by means of a specially developed bevel gear differential – corrector for central hours at 2 o'clock