PGC-F-000610-0000 Tricycle from 1885 with differential central gearing kept in the Genazzini Collection in Milan and shown at the exhibition "Man on two wheels" Credit: Alinari Archives, Florence WARNING: Permission must be required for non editorial use. Please contact Alinari Archives Photographer: Pellicci, Graziella Date of photography: 1980-1990 ca. Collection: Alinari Archives, Florence Object type: slide on film Photographic technique: P color process Dimensioni: 6 x 6 cm Technical info Image sizes (pixel): 3000 X 2047 Image sizes (cm at 300 dpi): 25 X 17 Image sizes (MB): 5.92 Color space: RGB