London Underground Roundel, 1912

The London Underground Roundel is world famous - it's red circle with a blue bar across the centre, with the words 'underground' or the station name in white letters, is a simple yet easily recogniseable symbol and one of the major London icons. The first known example of the roundel originated with the London General Omnibus Company in the late 19th century, who had a wheel with 'GENERAL' in the centre bar. It started to be adopted by the Underground in 1908 as a way to easily signpost individual stations. This example dates from 1912 and is from Mansion House on the District Line