NUMBERING SYSTEM
Some catalog numbers assigned in this volume are based on
other established references. This practice has been observed for
two reasons: First, when world coins are listed chronologically they
are basically self-cataloging; second, there was no need to confuse
collectors with totally new numeric designations where appropriate
systems already existed. As time progressed we found many of these
established systems incomplete and inadequate and many have now
been replaced with KM numbers. If numbers have changed, appropriate
cross-referencing has been provided.
Some of these references used in this catalog are (Y#) identifi ed
assigned by R.S. Yeoman, or slight adaptations thereof, in his Modern
World Coins, and Current Coins of the World.
In some countries, listings are cross-referenced to Robert
Friedberg’s (FR#) Gold Coins of the World or Coins of the British World.
Major Fred Pridmore’s (P#) studies of British colonial coinage are also
referenced, as are W.H. Valentine’s (V#) references on the Modern
Copper Coins of the Mohammedan States. Coins issued under the
Chinese sphere of infl uence are assigned numbers from E. Kann’s (K#)
Illustrated Catalog of Chinese Coins and T.K. Hsu’s (Su) work of similar
title. In most cases, these cross-reference numbers are presented in
the descriptive text for each type.
