18K yellow gold. Thin, engraved automatic movement with perpetual calendar, precise moon-phases and power-reserve indicator. Engine-turned dial in silvered, 18K gold. Chapter ring with Roman numerals. Dates, days and leap years on three sub-dials. Central months indication. Power-reserve indicator at . Moon-phases at . Secret signature. Engine-turned case back with sapphire crystal. 46 hours power reserve. 3Hz balance frequency. Water-resistant to 30 metres. Also available in 18K white and pink gold. Calibre: 502.3.DRP1, 12 lines, sapphire case back. Case dimension 39mm. 38 jewels. Water-resistant to 30 meters. Power-reserve 46 hours.