Vintage Wittnauer Stainless Steel "2000" Automatic Calendar. The case is stainless steel featuring a silver dial with silver circle hour markers. The case measures 42mm in diameter. The caseback is stamped "STAINLESS STEEL WITTNAUER "2000" U.S. PATENT NO. 3621648". This Wittnauer is accompanied by a generic strap and buckle. Condition: (Excellent).