Rare 'Calendrier Brevete' 14ct gold open faced pocket watch with calendar back, fine white enamel dial with Roman numerals, rail track minutes, Arabic numerals indicate five minute divisions, subs seconds dial at VI, fine gold hands with jewelled pointers. The back opening to reveal a calendar dial (with setting actuators on the bezel) Day indicators MDWDVZZ (Dutch); date, month aperture, central moon phase aperture. Stem wind movement with lever escapement. Total weight 98gm.