The Triang R12 Tanker Wagon was released in 1954. In the early years SHELL in red was seen on one side and BP in green on the other side. In the early 1960s SHELL and BP went their own ways and Triang responded by making two different wagons and later BP was dropped completely. This was the only wagon to be issued with a red painted sole bar, although towards the end of production the red paint was left off.

Left we see a 1954 version of the tanker wagon and the SHELL side.

1954- The reverse side of the same wagon, showing the BP transfer.

1957- Triang Catalogue

1958 Triang Catalogue.

1959- Triang Catalogue

1959- Mark 3 Couplings and main body produced in one piece, previous models of the tanker were made in three pieces giving the tanker a slightly different shape.

1959- The reverse side of the same model. "SHELL and BP" are heat printed. Still using the simple metal chassis. 

1960- Triang Catalogue.

1961- Triang Catalogue

1962- Triang Catalogue

The model now made in two variants, the SHELL variant now numbered 5056

Chassis now plastic and more detailed.

1962- BP variant

The BP variant now with the number 5057. (the BP version was later dropped from the range and just the SHELL variant remained, using BOTH numbers).

1963- Triang Catalogue

1964- Triang Catalogue

1965- Triang Catalogue

1966- Triang-Hornby Catalogue

1967- Triang-Hornby Catalogue

1968-Triang-Hornby Catalogue

1969- Triang-Hornby Catalogue

1970- Triang-Hornby Catalogue

1971- Triang-Hornby Catalogue

This is the model in its final form, it is carrying the former BP number.

The last couple of years the model no longer had a red painted sole bar, this may have been a cost saving action.

From 1972 the model was no longer in the catalogue.