Details

Includes booklets on: 'Railway and Tramway Telephone Traffic Control Equipment'; 'Electrical Appliances', 'Inter-phones and Accessories', 'Telephone Apparatus', 'Rubber Insulated Wires and Cables and Flexible Cords', 'Automatic Telephone System', 'Strowger Automatic Telephone System', 'Gamewell Fire Alarm and Police Systems', 'Electrical Appliances' and 'Loading Coils for Telephone Circuits'.