German Opera Singers - Lot of 33 Vintage Photographs

Fantastic lot of 33 vintage unsigned photo postcards of German opera singers from the late XIX century and early XX century, including Erik Schmedes, Theodor Reichmann, Erik Schrödfer, Antonie Schläger, Ernest Van Dyck, Andreas Dippel, and others.  Each one's size is approximately 5.5 x 3.5 inches, all in excellent condition.