Pocket watch: extremely rare double-sided calendar watch with moon phase and repeater, gold/enamel 'Calendrier Brevete' No.1209, signed Le Coultre ca. 1900: Ca. Ø53mm, ca. 113g, 18K gold, monogram enamelled FC, double astronomical functions, face with enamel dial and moon phase, pink gold hands, back with patent calendar with date, day of the week, month and length of the month, high quality lever movement, repeating the hours and quarters, in very good condition, very rare version with repeater.