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.
Originally covering 1835 or so to date, the main catalog (first edition 1972) evolved into an annual 20th century-only work, plus separate 17th, 18th, and 19th century volumes which are revised on a three-year cycle.
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.
[2] George S. Cuhaj is the current editor, with Thomas Michael credited as market analyst, although Krause collate contributions from many collecting experts and dealers.