This is a superb example of the Wrenn W5023 "Milk Marketing Board" 6 Wheeled Tanker Wagon in Blue slightly brighter in colour than its Period 3 counterparts where most of the Basildon production took place. This is a P4 example in a late Period box (type W7304) and includes yellow cardboard insert. As with all P4 wagons it has metal rimmed wheels and pin wheeled axles. 

A very popular Tanker Wagon for the layout and/or collection.

Overall condition is "near mint" for its age.