As chief engineer at the British Tabulating Machine Company at Letchworth Keen was approached to turn these ideas into a working reality. The first bombe, which was based on Turing's original design, was installed in Hut 1 at Bletchley Park on 18 March 1940 and was named "Victory". The second bombe, named ""Agnus dei"", later shortened to "Agnes", or "Aggie", was equipped with an important additional feature, the "diagonal board" that had been designed by Gordon Welchman. It was installed on 8 August 1940; "Victory" was later returned to Letchworth to have a diagonal board fitted.