NIVADA.A MEN'S STAINLESS STEEL CHRONOGRAPH AVIATOR/DIVER WRISTWATCHModel: ChronomasterDate: Circa 1970'sCase reference: 3730Movement: Signed, 17-Jewels, Cal.23Dial: Signed, black, applied luminous hour markers,outer minute division, white outer Tachymetre, white stick hands with luminous insert, red centre seconds hand for chronograph with luminous insert, subsidiary dial for chronograph's minutes with red 5 minutes division, subsidiary dial for seconds at the 9 o'clock positionCase: Signed, polished stainless steel, bi-directional black bezel with silvered division up to 155, screw down back, No. 85004Strap: Generic black, stainless steel buckleSize: 38.5mm