This catalogue is unique in providing the collector with the only comprehensive and authoritative guide devoted specifically to the local coinages of the Roman Empire, undoubtedly the most neglected series in the whole of ancient classical numismatics. Greek Imperial coins span more than three centuries from Augustus to Diocletian, and were issued at over six hundred mints from Spain to Mesopotamia.

The Byzantine Empire lasted for almost a thousand years after the fall of the Roman Empire in the West. The period covered by this catalogue is from the reign of Anastasius I (491518) until the capture of Constantinople by the Turks in 1453. When this catalogue was first published in 1974 it was hailed as containing more information in a concise form than any other single volume on the Byzantine series.

The third volume of the fully revised and expanded general catalogue of Roman coins extends coverage of the Imperial series from the accession of Maximinus I in AD 235 down to the assassination of Carinus and the accession of Diocletian half a century later. This turbulent period, during which the Empire came close to total collapse and disintegration, witnessed great changes in the Imperial coinage including unprecedented debasement and the beginning of the decentralization of the mint system.

The original edition of Sear's Roman Coins and Their Values was published by Seaby thirty-six years ago and has been through four revisions (1970, 1974, 1981 and 1988). However, the publication of the 'Millennium Edition' of this popular work makes a radical departure from previous editions.