1.75" with lightly tinted real photo without dot pattern from the early 1900s. Celluloid is just a hair concave and outer edge has some dark stain markings but they do not go into the scene very far. An amazing photo, especially when viewed under magnification, showing at least 25 horses hitched together in rows of five or six across and at least four deep. The massive harvesting machine is on the right side and four men stand atop it all looking out toward the photographer. Cello surface has minor hairline scattered scratches but vast majority of these show only in reflected light. Overall condition remains VG. A very early piece and the only example we've seen.