AVQ-A-002103-0039 Credit: Alinari Archives, Florence WARNING: Permission must be required for non editorial use. Please contact Alinari Archives Photographer: Unidentified Author Photographer: Leiser, Hermann Verlag Date of photography: 1910-1920 ca. People: Knüpfer Paul (opera singer) Collection: Alinari Archives-album collection, Florence Object type: postcard Photographic technique: P gelatin silver print Dimensioni: 8,6 x 13,6 Technical info Image sizes (pixel): 2802 X 1778 Image sizes (cm at 300 dpi): 23 X 15 Image sizes (MB): 4.23 Color space: RGB