Sinn Spezialuhren 556 I

The Sinn 556 I, reference 556.010, has a 38.5 mm steel case with a satinised finish. The 11 mm thick case has a see-through back and is water resistant to 200 metres. Glossy black surrounds the date display beneath the sapphire crystal. The hour and minute hands have luminous coatings alongside the indices. The central seconds hand moves over the glossy surface. Calibre SW200-2 winds automatically, while the case carries a screw-down crown.