WWII Nazi German, Winter/ Russian Front (Blue Cross) Dienstglas (Service Glass), 10 X 50 Magnification, German Infantry Officer\'s Binoculars By Carl Zeiss, Jena (rln) with WW2 1941 Case by ‘htg’ Duderstadt Plant, Westphalia. Sn 10400:10. WWII Nazi German, Winter/ Russian Front (Blue Cross) Dienstglas (Service Glass), 10 X 50 Magnification, German Infantry Officer's Binoculars By Carl Zeiss, Jena (rln) with WW2 1941 Case by ‘htg’ Duderstadt Plant, Westphalia. Sn 10400:10. Binoculars