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This model is the Dinky 25d-G Code 3 Petrol Tank Wagon in greenish grey with two "Wakefield Castrol Motor Oil" decals on either side of the tanker caps.
The model has a separate grille and headlights in silver with the front bumper and wheel arches in black. There is no glazing.
The baseplate is in black metal marked with "Dinky Toys" in the top centre and "Made in England by Meccano Ltd" in the bottom centre on two lines.
All wheels are black cast metal hubs with black rubber tyres.
This model was created around 2010.