Sinn Spezialuhren 303

The Sinn 303, reference 303.010, is a chronograph with a 41 mm steel case water resistant to 200 metres. Polished and satinised surfaces finish the case, which measures 15.5 mm thick. The matt black dial displays small seconds beneath sapphire crystal. A tachymeter scale runs around the hour display. Automatic calibre Valjoux 7750 has shock-resistant construction. Luminous hour markers surround the date and weekday windows on the dial. The crown screws down into the case.