This is a window and utility key used on trains during the era of JNR (Japanese National Railways). This specialized key was reportedly used by conductors and maintenance staff to unlock and lock the windows of old passenger cars and electric trains, specifically the internal locks within the window frames. This item, a genuine piece of railway equipment from the JNR era, was not generally available to the public and is now difficult to obtain. Made of metal, it has a solid feel and features a rugged design typical of the Showa period. *Please note that this is a used item and shows signs of wear, including scratches and scuffs, due to its age and use. Please check the photos for the condition.