Vintage metal spot light b t h ( British Thomson Houston) we believe this was originally a ships light now repurposed as a spot light very long cable 18 cm wide 22 cm tall lovely aged look great bracket to hang on wall ceiling etc adjustable 
Please note we cannot guarantee electrical items and therefore must be pat tested by the buyer 
British Thomson-Houston (BTH) was a British engineering and heavy industrial company, based at Rugby, Warwickshire, England. Originally founded to sell products from the Thomson-Houston Electric Company, it soon became a manufacturer using licences from the American company. They were known primarily for their electrical systems and steam turbines.
British Thomson-Houston
BTH logo on an electric motor access plate
Industry
Heavy industrial
Founded
1886 as Laing, Wharton and Down
Headquarters
Rugby, Warwickshire
Parent
General Electric
BTH merged with the Metropolitan-Vickers company in 1928 to form Associated Electrical Industries (AEI), but the two brand identities were maintained until 1960. The holding company, AEI, was bought by GEC in 1967.
In the 1960s AEI's apprenticeships were highly thought-of, both by the apprentices themselves and by their future employers, because they gave the participants valuable experience in the design, production and overall industrial management of a very wide range of electrical products. Over a hundred of the apprentices - who came to Rugby from all over the UK, and a few from abroad - lodged in the nearby Apprentices' Hostel at Coton House which was uphill from Rugby on the road to Lutterworth and Leicester.
Each year in Rugby there was a big parade of floats run by the apprentices.
In 1980, G.E.C. Turbine Generators Ltd, on the Rugby site, was awarded a Queen's Awards for Enterprise.[citation needed]