Vintage (50s) Omega 20J Automatic Cal 471 Square Watch Ref: 3971 SC in Good Mechanical Working Condition. Has black dial which I am told may have been refinished, Silver Baton Indices, Signed Crown Omega, Has Exotic Gallo Black Leather Strap which still has life in it. Superficial Scratches on the Case and Back. See Pictures. This watch was purchased from the grandson of a gentlemen who had bought it new. Beautiful watch!