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In page Model car:

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Over time, market pressures have led to further changes in how models are designed and manufactured. In the 1960s, many European models had opening parts and working components, but today, few of the smaller scale toys do. More working parts mean more production expense, and Hot Wheels and Matchbox vehicles now rarely have such features. Today, the number of moving parts has been reduced even in large-scale models. For example, premium model maker AUTOart introduced a line of race and sports cars in 1:18 scale with no opening parts.[citation needed]