Designed by architect Sir Giles Gilbert Scott on a Post Office commission to celebrate the Jubilee of King George V in 1935, the K6 telephone kiosk reached the streets a year later. Made of cast iron and painted red throughout, it had been installed in 20,000 examples across Great Britain by the end of the 1930's. The Second World War halted mass production of the K6, though a further 2000 were produced and installed once shortages of raw materials eased. After the war, installation resumed at a faster rate, although until 1950 it remained less than half the prewar level. Between 1950 and 1955, about 25,000 K6's were installed, a higher rate than before 1939, and although the pace later slowed, K6's were still being installed at about 1000 a year in the mid-1960's. The central K6 telephone kiosk and the one to its left were manufactured by the Carron Company of Stirlingshire, Scotland, and the K6 telephone kiosk to the right was manufactured by MacFarlane and Co. LTD., Saracen Foundry, Glasgow, Scotland.