Omega. A stainless steel manual wind single button chronograph wristwatch, Chronostop, Ref: 146.009/146.010, Circa 1969 Omega. A stainless steel manual wind single button chronograph wristwatch, Model: Chronostop Reference: 146.009/146.010 Date: Circa 1969 Movement: 17-jewel Cal.865 manual wind, No.28431235 Dial: Slate grey, applied polished baton hour markers, white outer 1/5th second divisions with luminous dot 5 minute markers, pointed white baton hands with luminous inserts, orange centre chronograph hand Case: Brushed and polished tonneau form, screw down back, winding crown at 4, chronograph button at 2 Strap/Bracelet: Associated black leather Buckle/Clasp: Signed steel buckle Signed: Case, dial & movement Size: 35mm