Coins and Medals from around the world. If you collect world coins, we strongly recommend that you buy the Krause catalog or world coins. The by-century volumes list by date virtually every coin type, most of which are photographed, with mintage and other information, plus market valuations in up to 5 grades. Listings are by denomination rather than series, as in earlier World coin catalogs. The proprietary Krause-Mishler (or KM) numbers are widely used; for just a few countries earlier systems such as Y (Yeoman) and C (Craig) numbers are given instead. Data from the by-century volumes are collated together in special editions for Crowns, Gold, German, and North American coins. Fantasies and medallion issues, which do not appear in the other catalogs, are covered in a publication called Unusual World Coins. There is also a publication called Collecting World Coins that includes only 20th- and 21st-century coins that circulated regularly.
The catalogs are list priced at $73 to $85 ($25 for the shorter 21st century catalog), but they are often discounted, and lower prices are found for out of date, but still useful catalogs. The catalogs can be found in most public libraries. Older editions are steeply discounted even though revisions between editions in many areas are minimal. Following the appearance of unlicensed DVD versions, DVDs were included with the 1601-1700 4th edition, the 1901-2000 36th edition, and possibly others, but are now sold as a separate product. In 1975, the Catalog comprised a single volume with about 1,000 pages. By 2007, it had expanded to a five-volume set with more than 6,000 pages in total.