LNER A4 CL. 4491 'CmmnwlthOfAuHOR R3992 Hornby LNER, A4 Class, 4 6 2, 4491 'Commonwealth Of Australia' Era 3 2022 Catalogue One of the streamlined A4 Class created by Sir Nigel Gresley, 'Commonwealth of Australia' bore the original LNER number 4491, before its change to No. 12, and 60012 under British Railways. Entering service in 22 June 1937, 'Commonwealth of Australia was withdrawn in 20 August 1964 after 27 years of service under both Grouping and Nationalisation.