I have never heard the term "coins of
poor fabric" before. In English they are mostly just referred to as barbarous radiates even though we all know the name is wrong - they are not made by "barbarians" and it is an unfair and biased judgement to call the
style "barbarous" as that implies a judgement that they are
poor quality and amateur when many scholars believe that the
style was an intentional one reflected local Gault-Roman art traditions during a time of increased independence.
As you are probably aware some scholars divide the unofficial or "barbarous" coinage into several groups depending on how far removed they are from the original - both in terms of module (size and
weight) and in
style. That is why I asked about your definition of "coins of
poor fabric" because some (indeed many) "barbarous radiates" are actually of fairly
good fabric - they are of similar
diameter and
weight to official Gallic
mint issues. Others of course are very small, light and
poor quality.
Can I assume that you are interested in any, as long as the are "barbarous"/unofficial and not official??
Anyway, are familiar with and have access too:
THE COINAGE OF
THE GALLIC EMPIRE, Jerome
Mairat, Wolfson College.
John A.
Davies. Barbarous radiates: a study of the irregular
Roman coinage of the 270s and 280s AD from - southern
England.
SC