Patek Philippe 855/1

Patek Philippe 18K Gold Pocket Watch Ref 855/1, Silver dial with applied gold stick type chapter markers for all except Roman numerals for twelve. Gold pencil type minute/hour hands. The time only watch utilizes a caliber 175 ( F. Piquet ebauche) 18 jewel five position adjusted movement, heat and cold, and isochronism, with free sprung gyromax balance. Marked with hallmark for 18k gold on the case back.