DVD 4468 MALLARDDVD 4468 MALLARD 14. 95 Arguably Britains most famous locomotive, A4 Pacific, No. 4468 Mallard is the prized locomotive within the National Railway Museums collection at York. On 3 July 1938, Sir Nigel Gresleys A4 Pacific Mallard set a world speed record for steam traction of 126 miles per hour. This is a record that has never been bettered! This dvd is a tribute to this magnificent locomotive and to those who restored her to working order again in