The outer vehicles in this view, 109 and 123, were both part of the original batch of AEC Regents new in 1933 and 1934 respectively and rebuilt by Welsh Metal Industries in 1947.
139, despite not having been recorded as having any body rebuilds, has been rebuilt with a different style of front destination box - when new it was similar to those on 109 and 123 although there were other differences between the two batches.
173 was one of a trio of 'unfrozen' AEC Regents new in 1941 and in 1953 would receive the Weymann H26/24R body from 149 (BTX 580).
