Tissot, Navigator, ref. 45 501, a stainless steel wrist watch, circa 1970, automatic chronograph movement, 17 jewels, cal. 2170 Lemania 1341, black dial, luminous baton markers, luminous pointed baton hands, centre chronograph minute and second recording hands, subsidiary dials for constant seconds and 12 hour recording, date aperture at 3 o'clock, screw down case back, on an unsigned black ostrich strap with Tissot pin buckle, case back, dial, movement and buckle signed, width 38mm