GM384 Gauge Traffic Lights Kit (OO Scale) 1-148-Scale and finally four trailing wheels

and finally four trailing wheels

but in reality

Length 61mm

though by 1935 the older J51s had all been rebuilt as J50s with larger boilers

WIDTH 106mm

GM384 Gauge Traffic Lights Kit (OO Scale) 1-148-Scale and finally four trailing wheelsThis kit contains everything you need to construct a working traffic light complete with LEDs, Wire, and resistors. Soldering may be required to construct this kit. To operate this item you will need to use either a Rotary Switch for manual operation or a Train Tech Traffic Light Controller for automated operation. We recommend using a WM4 Wall Mounted Transformer to power these lights. If you are using DCC you will need the Traffic Light Controller