2005,KM-238, Schön-238 Country Germany – Federal Republic (Germany) Year 2005 Value 10 Euro Metal Silver (.925) Weight 18 g Diameter 32.50 mm Commemorative issue Centennial of Albert Einstein’s Relativity Theory Obverse Lettering: BUNDESREPUBLIK DEUTSCHLAND 2005 10 EURO J Engraver: Heinz Hoyer Reverse Lettering: ALBERT EINSTEIN E=mc² HH 100 JAHRE RELATIVITÄT ATOME·QUANTEN Engraver: Heinz Hoyer