AVQ-A-000600-0015 A group of men with a trolley on a railroad track in Mexico. In the background, the entrance to the tunnel number 16 "Boca del Monte". Credit: Alinari Archives, Florence WARNING: Permission must be required for non editorial use. Please contact Alinari Archives Photographer: Unidentified Author Date of photography: 1870 - 1900 Place of photography: Mexico Collection: Alinari Archives-album collection, Florence Object type: print on paper Photographic technique: P albumen P gold toning Dimensioni: 19 x 25 cm Technical info Image sizes (pixel): 2472 X 1884 Image sizes (cm at 300 dpi): 20 X 15 Image sizes (MB): 3.64 Color space: RGB