The Dinky Trojan 15cwt Van Dunlop. Second in the series of Trojan vans ('Esso', 1951; 'Dunlop', 1952) Dinky Toys introduced the 'Dunlop', 31b, model in the June, 1952, edition of the Meccano Magazine. The 3 3/8 inch long model had a purchase price of 2/11. Despite the popularity of the actual vehicle, the model was introduced without a fanfare, even though it did appear in the 1952 Dinky Toy catalogue. Dinky Toys launch, through the Meccano Magazine. In December 1954, when the van had been renumbered 452, the cost had risen to 2/6. The van's red livery carried an advertisement for 'Dunlop', a Birmingham-based manufacturer of tyres and other rubber products. The model had dark red ribbed hubs and smooth black tyres. The model was deleted in 1957.

The Trojan 15cwt van was manufactured by The Trojan Motor Company, at their Purley Way factory, Croydon, between 1947 and 1961, when the firm ceased business and the plant was turned over to assembling Lambretta scooters and Heinkel bubble cars. Originally, this popular van was powered by a 2.3 litre, 2-stroke petrol engine. The 2-stroke van struggled up the incline of the Purley Way, adjacent to Croydon Airport and was test-driven around The North Downs, at Westerham and Woldingham, on the Kent-Surrey border. But throughout the 1950s, it was powered by a more powerful Perkins P3V diesel engine.

'Dunlop' tyres is a brand name owned by the Goodyear Tyre and Rubber Company. However it is also owned by the Ruia Group and Sumitomo in Africa and Asia. Since 1999, Goodyear and Sumitomo have collaborated over tyre production and this led to Goodyear ceasing tyre production in the UK from 2006, although they have maintained the manufacture of motorsport tyres at their original plant, 'Fort Dunlop', in Erdington, Birmingham.

Launched in June 1952, the model was re-numbered in 1954 and deleted in 1957. It was available in red finish. Released as Dinky 31b in 1952 withdrawn as Dinky 31b in 1957.