Baume & Mercier Clifton 1830 Eight Day Power Reserve 10195

The manually wound movement draws eight days from a single barrel. Once 192 hours have run, the balance is stopped, because too little energy is left to keep good time, and a hand at 9 o'clock shows how much reserve remains. A small seconds sits at 6 o'clock on a domed, opaline silver dial. The movement beats at 28,800 vph, has a stop-seconds function for setting the time, and shows through a transparent caseback, with Côtes de Genève on the bridges and the Greek letter Phi on one of them.

The 18k red gold case is polished and satin-finished, 13 mm thick, under sapphire. The Clifton 1830 (10060) is a slimmer 42 mm red gold watch, 8.9 mm thick, with a manual-wind La Joux-Perret 7381 and no limited run. The Clifton 1830 Perpetual Calendar (10306) shares the red gold and the 42 mm size in an 11.2 mm case.