Registration Number 2519 WE, built in 1958 was the first of six "B3RA"
Bridgemasters with Park Royal H45/31R bodywork delivered to Sheffield
Corporation in January '59 (Fleet Number 519).
Registration Number 2523 WE, built in 1959. It was Sheffield's fleet no. 523,
from the same batch as 2519 WE.
Information courtesy of Roger Hardy