County Motors 73, DVH752, seen here in Dewsbury was a Leyland PS1 with Roe B32F body and was the first of six new in 1948. It was withdrawn in 1959 and passed eventually into preservation in 1974.
On Dick Gilbert's site Surviving Single-Deck Halfcab Buses & Coaches, the latest information date is shown as 2000.

Photo taken by John Kaye, Sunday 23 June 1957, Dewsbury