The Marx Vintage Automatic 3-Light Signal O Gauge Accessory is a pre-built model train signal for collectors and hobbyists. This red signal features an analog control system and light function, making it a vintage piece that adds charm to any model railroad layout. Made of pressed steel and measuring 6 .5 inches in height, this 1950s-era accessory is compatible with O gauge trains and is perfect for enhancing the transportation-themed scenery on your train layout.UNTESTED FOR PARTS OR REPAIR. EMAIL ANY QUESTIONS. THANKS FOR LOOKING.