Patek Philippe

Swiss Watch Fair 1971 BF 307
Even in the design of new quartz electronic models, Patek Philippe remains faithful to its Cercle d’Or" style. The quartz resonator vibrates 8,192 times per second, a frequency divided by integrated circuits. The rate variation for a whole year is inferior to one minute. Both case and dial arc in 18 carat yellow gold (PATEK PHILIPPE)