A specimen of this type (now lost) was found at Dorestad, which was during Beonna's time an important trading centre: these coins resemble Frankish or Frisian deniers that were issued from the Maastricht area during this period.
A representative example of this type (now lost) was discovered at Dorestad, a prominent trading center under Beonna's rule. The coins in question show similarities to Frankish or Frisian deniers minted in the Maastricht area around the same time.