A Dufaycolor colour transparency of the Old Bailey law courts damaged by German bombing, taken by an unknown photographer during World War Two. On 10 May 1941, in one of the worst raids of the London Blitz, a number of prominent buildings were damaged, including Westminster Abbey, the Houses of Parliament, the British Museum and the Old Bailey. The Dufaycolor process was introduced as cine film in 1932 and as rollfilm for still photography in 1935. Based on Frenchman Louis Dufay's (1874-1936) Dioptichrome process of 1908, it was the last 'additive' colour process to be marketed and consisted of a very fine, regular filter screen made up of red, green and blue lines printed on a film base. Dufaycolor was popular with both amateur and professional photographers and survived until the 1950s.
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