One of the iconic Dinkys, the Euclid earth dumper.
By the mid fifties when this was made Euclid had been absorbed by
General Motors and while being an American company I believe they made
these in Scotland. The Euclid Series R-15 was certainly a big
truck by the standards of the time being 23ft long and more than 10ft
high, it has a 1940s look about it but is still in production up to the
mid sixties according to my 1966 Observers book of Commercial Vehicles.
Dinky started production in 1955 and kept it in the range up to 1969. There are four variations. In the first two years of production the logo has a grey background, then from 1957 onwards it has a red background. The next change is in 1961 when it got windows and at the end of the run the wheels were painted red or green and it is these contrasting wheel colour versions that are hardest to find and get the best price.
It is a sought after model and I guess it's playability gave it a fairly high attrition rate with it being left outside in sand-pits, both add to the value and you will always have to pay a high price for one of these.