Sinn Spezialuhren 903 Klassik

The Sinn 903 Klassik, reference 903.081, is a chronograph in a limited edition of 300 pieces with a 41 mm steel case water resistant to 100 metres. A black electroplated dial beneath sapphire crystal displays a moon phase alongside a hand date. Small seconds occupy a subsidiary counter. The polished and satinised case has a see-through back and measures 13.2 mm thick. Winding is manual for calibre Lemania 1883. An interior rotating bezel carries the slide-rule logarithmic scale. Luminous indices surround the counters beside painted hour and minute hands.