Spink 2007
Coins of England & the United Kingdom has this comment in the Edward I section:
"The
provincial mints were again employed for a subsidiary re-coinage in 1300 in order to re-mint lightweight coins and the many illegal
esterlings (foreign copies of the English pennies, mainly from the
Low Countries), which were usually of poorer
quality that the English coins."
English Hammered Coinage, vol. 2 by J.J.
North says this in the Edward I section (p. 19):
"There are are also a large number of foreign imitations and
forgeries of this series (Pollards, Crockards, Lushbournes, etc.). Those which bear the same
bust and inscriptions as English coins can usually be detected by the blundered legends and light
weight or base metal."
So that is likely the origin of this coin.
Still a very nice and interesting coin.
Out of curiosity, what is the
weight?