• Item owner - FNM

• Category - FNM Collection

• Inventory - 0365

• Author - A.B.C. Lux

• Dimensions - 26x11x11 cm

• Dating - 1960-2000

Robust steel box with a glass window at the front and an upside-down U-shaped handle on top. It opened like a book from one side. Inside, it housed batteries and cables powering a lamp socket assembled on the back wall behind the window. There is a switch on the upper edge of the box, but a spring socket on the handle closes the circuit when it is inserted in its seat at the tail end of the train. A ratchet on a groove on the front moves a coloured pane of glass (red or green) to position it between the glass window and the light bulb, changing the colour of the light.
It was supplied with control trailer no. 800.02 and signalled the colours green, white, or red, depending on the signal to be given by the Conductor or at the tail end of the train.
It was supplied with the rolling stock and used by the train conductor, either manually or by fixing it onto the tail end of the train, according to the requirements of the regulations.