MODEL: 16750 S/NO:"6273xxx" Year 1980's. Chronometer in full stainless steel case 40mm, bidirectional rotative bezel fitted with the Rolex Blue/Red insert for the reading of the second 24-hour time zones, bi-colored to obtain a better distinction of the diurnal and nocturnal hours. Case with shoulder protecting the Rolex winding-crown. Fitted with original Rolex stainless steel oyster bracelet. Automatic movement, rolling date and acrylic crystal. (Discontinued model, highly collectible). Rolling date model.