18ct white gold Nautilus with power-reserve and moon phase for £65k...   this precious metal 5712 does make an awful lot of sense.  

The beautiful asymmetric slate-grey dial with horizontal embossing features a power-reserve display, full 31 day calendar, moon-phase and running seconds. At just 8.5mm slim, the 40mm three-piece case is finished with bevelled edges; a striking contrast between the satin finish and polished sections. Patek's in-house self–winding calibre 240 (PS IRM C LU) with micro-rotor is visible through the exhibition sapphire caseback.

Fitted to a new Patek Philippe black alligator strap, secured by a white gold Patek folding clasp and presented with its Patek box, booklets, literature, setting stylus, additional rubberised Patek strap, and Patek Philippe certificate of origin, dated January 2015.