My deceased father was awarded a prize while working for the Osaka Railway Bureau during the era of the former Japanese National Railways. A cross-section of a double-headed rail from the Meiji era. Based on the explanatory document I received at the same time, I believe it is a rail that was only used for a short period from the 5th to the 8th year of Meiji (1872-1875). Extremely, extremely rare and valuable item. Comes in a paulownia wood box.