See (https://en.wikipedia.org/wiki/History_of_public_transport_authorities_in_Manchester) for the Wikipedia article on Manchester's Transport history.
Registration Number 9746NA Built April 1961 (PRV Body Nos. 45175-9); for
Manchester Corporation.
Registration Number 3657NE Built
November 1962 (PRV Body Nos. 48713-22); for Manchester Corporation.
Registration Number HVM924P Built
in March 1968 (Body Nos. B55359-406); for Manchester.
Registration Number LNA255G Built
February 1969 (Body Nos. B56393-439); for Manchester.
Registration Number RNA227J Built
May 1971 (Body Nos. B57720-79); for Manchester.
Registration ANF162B Built November 1964 (Body Nos. B50002-21); for Manchester.
Additional
detailed photos of this bus are below: