Sinn Spezialuhren 903 St Schwarz

The Sinn 903 St Schwarz, reference 903.041, is a chronograph in a 41 mm steel case water resistant to 100 metres. Under sapphire crystal, the UV-resistant black electroplated dial displays a date and small seconds. A logarithmic scale runs around the interior rotating bezel. Calibre SW500 is a shock-resistant automatic movement. The case measures 14.5 mm thick with polished and satinised surfaces surrounding a see-through back. Luminous indices and hands punctuate the dial beside the counters. The winding crown screws down.