Model cars

Although the British scale for "O" gauge was first used for model cars comprised of rectilinear and circular parts, it was the origin of the European scale for cast or injection moulded model cars. MOROP's specification will not alter the series of cars in 1:43 scale, as it has the widest distribution in the world.

In America, a series of cars was developed from at first cast metal and later styrene models ("promos") offered at new-car dealerships to drum up interest. The firm Monogram, and later Tamiya, first produced them in a scale derived from the Architect's scale: 1:24, while the firms AMT, Jo-Han, and Revell chose the scale of 1:25. Monogram later switched to this scale after the firm was purchased by Revell. Some cars are also made in 1:32 scale, and rolling toys are often made on the scale 1:64.