The Bombe forms the centrepiece of a newly-opened dedicated display at Bletchley Park, Milton Keynes - the historic site for British World War 2 code breaking activities. It was completed by the BCS-funded Computer Conservation Society.
The unveiling day, in July, also commemorated the efforts of the machines' WRN operatives during the war and their contribution to the early history of computing.
Nigel Shadbolt and Bombe operatives
Nigel Shadbolt, John Harper - director of the Bombe rebuild and HRH Duke of Kent at the Bombe
BCS president Nigel Shadbolt addressing the assembled audience
Members of BCSWomen with some original Bombe operatives