Presented to the public at Baselworld in 1970 , the Patek Philippe “ Naviquartz ” was produced from 1969 (or late 1968) until the late 1980s . Designed as a backup navigational and timekeeping system for ships , it was originally a true marine chronometer . However, it quickly became a sought-after object for the home or office . According to Antiquorum , the “ Naviquartz ” was made in three series : 1) “ Naviquartz I ”, calibre RH 29 , available under: Ref.