Wristwatches
The 20th century is the century of the wristwatch. Its exterior reflects the spirit of the times, from the "Roaring Twenties" to the trendy, motley-coloured plastic watch. For a long time, it would tick away with a mechanical movement as its heart. Then, quartz technology took over in the 1970's. Mechanical wristwatches thus became high-priced luxury products.