Audemars Piguet Royal Oak Double Balance Wheel Openworked /Root/Start/Hublot/Big Bang The small seconds at nine

The small seconds at nine o'clock completes one rotation every ten seconds

Reference 2-39-47-02-01-04 combines the 42 mm Rose Gold case of the Sixties with a black dial and a date display

visible through the display case back

Ob im Büro

The Omega Speedmaster '57 Co‑Axial Master Chronometer Chronograph (Ref

Audemars Piguet Royal Oak Double Balance Wheel Openworked /Root/Start/Hublot/Big Bang The small seconds at nineAudemars Piguet Royal Oak Double Balance Wheel Openworked (Reference 15407ST. OO. 1220ST. 02) Reference 15407ST. OO. 1220ST. 02 brings the skeletonized double balance wheel calibre into a stainless steel case the most accessible version of this elaborate construction. The dial is rendered in skeleton metal. Two balance wheels on a single axis share the oscillation and mutually compensate for disturbances. Central seconds, luminous hands, and luminous