GPO 150

The GPO 150 or candlestick was introduced at the same time as the model 121. It became a very popular desk telephone for central battery operation. It was available with or without dial. There was not enough space for the bells and the induction coil in the candlestick, so it had to be connected to a bellset No 1. The bellset was usually mounted against a wall in the hallway of a house.