R113 GOODS TRUCK WITH DROP SIDES 1954-1973

1957 new running number B4593 XP.
Based on a wagon built in the 1950s and able to run on express trains, "XP". The original wagon was used for container traffic and large numbers were used by the engineer department for balast transport during track laying. Mostly maroon, but I am on the lookout for a grey version.
1957-1965 B4593 (the threes had flat tops)
1966-1973 B4593 (the threes had rounded tops).
In 1966 a stop was added to stop the side dropping down further than 90 degrees, this was to stop the door hinges breaking off.
Running numbers not illustrated:- 1954-1956 B712 and 8051.

1957 Triang Catalogue

1958 Triang Catalogue

1959 Triang Catalogue

1959 new couplings

1960 Triang Catalogue

1961 Triang Catalogue

1962 Triang Catalogue

1963 Triang Catalogue

1964 Triang Catalogue

1965 Triang Catalogue

1966-1973

1966 Triang-Hornby Catalogue

1967 Triang-Hornby Catalogue

1968 Triang-Hornby Catalogue

1969 Triang-Hornby Catalogue

1970 Triang-Hornby Catalogue

1971 Triang-Hornby Catalogue

1972 Triang-Hornby Catalogue

1973 Hornby Catalogue
The "13T" has at last a rounded 3 in the illustration, 8 years late!
In the very last year the model has a new running number B4597.
Illustration mistake or indeed a new number? I have never seen a B4597.