Seamaster 120 166.091

“Seamaster 120 m / 400 ft” with high-beat caliberCaliberThe designation of a watch movement, identifying its design or movement family. 1002, in a water-resistantWater resistanceA watch’s ability to resist water entering its case under specified conditions, often stated as a pressure or equivalent depth. Seals can deteriorate and the crown can be damaged, so an original rating does not establish a vintage watch’s present resistance. case by Ervin Piquerez of Bassecourt built to his patent No. 487 449 (filed 1967, granted 1970).