This is the Wrenn W5062 Private owner "Royal Daylight" Tank Wagon in Black, from Wrenn, Basildon Period 4 issue.Just over 1200 were produced by Basildon, the majority between 1982/3 when the Period 4 wagon production really got underway. As with all P4 wagons it has metal rimmed wheels.

Comes complete with Period 4 box (type W7304) and yellow plastic insert.

Condition of Wagon/box is "near mint" for their age