Colliery Tannoy – D.A.C.
A D.A.C. armoured colliery tannoy. Manufactured by Stedfast Electrical Controls Ltd. Hucknall, Nottingham, England. Model SA-1.
Made from iron, steel, rubber and brass. Size 10″ X 7″ X 6″ inches. Date 1970’s-1980’s.
These tannoys were known as dacs and were located at all major transfer points, headings and coal faces etc and used for communication between such places and the surface control room.