Retro decorative glass light fitting (Brasenose OX11)

The amber moulded outer glass shade is 30 cm diameter with a dimpled clear glass inner. The whole fitting is 30cm to the top of the aluminium cone. The cable and cover for a standard ceiling rose are included. We originally bought the fitting to hang over the dining table in the house we bought in 1977, and was in use until I took it down recently for redecorating.