Sinn 156 and Sinn 156b – Ghost of Gerald Genta,Sinn 156B with bracelet, box, papers, recent service. | WatchUSeek Watch Forums,Lot - SINN Sinn 156b, Military Chronograph, movement no. 4384227, case no. 89385, circa 1990,Sinn Military Pilot Chronograph 156.B circa 1980's w/ Box & Warranty,Finally! Sinn Revives an Iconic Military Chronograph - Worn & Wound