Post-war European diecast models were produced in fairly simple form, such as Dinky Toys (often in the train related 1:64 or 1:43). Dinky production began in 1934, while Matchbox cars (often approx. 1:64) were introduced in the mid-1950s. These early die-cast toys featured no opening parts whatsoever. Affected by market forces and by improvements in production technology, companies began to improve the quality of the toys over time. The "best" improvements were often copied by the competition within 1–2 years of their appearance on the market. Examples of these would be plastic windows, interiors, separate wheel/tire assemblies, working suspensions, opening/moving parts, jeweled headlights, mask-spraying or tampo-printing, and low-friction 'fast' wheels.