This is a great example of the Wrenn W5018 "Star Salt" wagon in Orange/Red, running number 105. The majority of these were issued in Period 3 by the Wrenn, Basildon factory, however most were in the true RED colour during the early years of Period 3 production, hence I would place this Orange/Red example as circa 1978/9 original issue. As with all P3 wagons has pin wheel axles and metal rimmed wheels.

Comes complete in P3 box (type 7.5p) and yellow plastic insert 

Condition is "near mint" considering age.