Sinn Spezialuhren 1900

The Sinn 1900, reference 1900.010, has a silver savonnette pocket-watch case 50 mm in diameter and 12 mm thick. Flat hand engraving depicts the Frankfurt skyline on the cover. A subsidiary dial shows small seconds beneath plexiglass. The hand-wound calibre Unitas 6498-1 incorporates a Glucydur screw balance and Nivarox hairspring. Geneva waves decorate the shock-resistant movement. Consecutive numbering identifies each edition, while the engraver signs the individual work.