Breguet 3820 Type XX / Type XXI BrandBreguet CollectionType XX / Type XXI Model3820 Reference3820ST/H2/9W6 Country of originSwitzerland Type of watchMen's Case materialSteel Case diameter39 mm Case thickness14.4 mm Power reserve48 hours Water resistance100 m Metal braceletAutomaticChronographHoursMinutesSecondsDateWristwatch