Bus number 2533 was a Guy 'Arab' III Special with a Gardner 6LW 8.4 litre engine and a Metro-Cammell body. It was one of a hundred Guy 'Arab' III Special's operated by Birmingham Corporation Transport. It entered service in the period July 1950 to May 1951 and, from the photo, appears to have been withdrawn from service on the 28 October 1977. Four of the Guy 'Arab' III buses survived to operate on the last day of rear platform bus operation in Birmingham on the 31 October 1977.
(Information source: David Harvey's 'Birmingham Buses at Work Part 2, 1942-69', 2006.)
(Information source: David Harvey's 'Birmingham Buses at Work Part 2, 1942-69', 2006.)