Omega. A stainless steel chronograph divers wristwatch
Seamaster Chronostop, 1960's
17-jewel Cal:865 manual wind chronograph movement, mat black dial with applied baton hour markers, luminous dots, outer seconds/minutes and 1/5th seconds divisions on a white ring, outer rotating black bezel with Arabic 5 minute divisions, brushed and polished case with pusher at 2 o'clock and crown at 10 o'clock to adjust the inner bezel, fitted makers leather strap with folding clasp, case, dial and movement signed 40mm.