Sinn Spezialuhren 240 St GZ

The Sinn 240 St GZ, reference 240.011, uses a bead-blasted steel case measuring 43 mm across and 11 mm thick. The case is water resistant to 100 metres with D3-System crowns. An interior rotating tide bezel shows relative water levels. Beneath sapphire crystal, the dark blue dial shows central seconds, a date and weekday. Luminous indices mark the hours around the dial. A self-winding calibre SW220-1 runs the watch.