Die-cast toys were first produced early in the 20th century by manufacturers such as Meccano (Dinky Toys) in the United Kingdom, Dowst Brothers (TootsieToys) in the United States and Fonderie de précision de Nanterre (Solido) in France. The first models on the market were basic, consisting of a small vehicle body with no interior. In the early days, as mentioned, it was common for impurities in the alloy to result in zinc pest, and the casting would distort, crack, or crumble. As a result, die-cast toys made before World War II are difficult to find in good condition. The later high-purity Zamak alloy avoided this problem.