and a 1958–59
Opel Kapitän cars in 1:43 scale by Altaya; issued as part of
The Opal Collection partwork published by Eaglemoss Partwork series run for a determined length and have a finite life. Generally, partworks cover specific areas of interest, such as sports, hobbies, or children's interest and stories such as
PC Ace and the successful
The Ancestral Trail series by
Marshall Cavendish Ltd. They are generally sold at
newsagents and are mostly supported by massive
television advertising campaigns for the launch. In the
United Kingdom, partworks were often launched by heavy television advertising each January. Partworks often include cover-mounted items with each issue that build into a complete set over time. For example, a partwork about art might include a small number of paints or pencils that build into a complete art-set; a partwork about
dinosaurs might include a few
replica bones that build a complete model skeleton at the end of the series; a partwork about
films may include a
DVD with each issue. In
Europe, partworks with collectable models are extremely popular; there are a number of different publications that come with character figurines or
diecast model vehicles, for example: The
James Bond Car Collection. In addition, completed partworks have sometimes been used to create case-bound reference works and
encyclopedias. An example is the multi-volume
Illustrated Science and Invention Encyclopedia which was created with material first published in the
How It Works partwork. According to the
Periodical Publishers Association in 2003, partworks were the fourth-best selling magazine sector in the UK, after TV listing guides, women's weeklies and women's monthlies. A common inducement is a heavy discount for the first one or two issues. The same series can be sold worldwide in different languages and even in different variations. == History ==