Data from the EMC was much less complex to filter to the VASLE requirements than the PAS data. Dr Mark Blackburn kindly provided the project with a full download of the EMC from 7 October 2007. Coins were excluded if production began after AD 1000, in line with the VASLE study period of 700-1000. A circulation period of at least 30 years has been accepted for early medieval coins (Blackburn 2003), so at the earlier end of the study period coins were only excluded if their production began before 670.
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Last updated: Tues Apr 21 2009