This rare medieval coin of Gottfried II von Heinsberg was in rather poor condition, with a thick find patina (probably mostly AgSO4 and AgCl) and a large albeit superficial iron oxide deposit on the reverse. Using a brief immersion in sodium thiosulphate, followed by aprox. 15 minutes of local application of (very concentrated) synthetic citric acid, followed gentle rubbing of a cotton swab and bamboo tooth stick on the iron oxides (reverse), I ended up with this: Gottfried II von Heinsberg, 1303-1331. Denar (Köpfchen), Blankenburg or Heinsberg mint. A local imitation of the contemporary coinage of the Dutch counts Floris V and Willem III. Rare - but this variant is even scarcer as the typical four flowers in the reverse fields are omitted. I restored this coin after a very busy ER shift of 12+ hours ... this gave me an immense satisfaction following the chaotic shift.
Superb job, @Roerbakmix. Congratulations on that, and a magnificent coin! I'm completely unacquainted with the type, along with the prototypes. Were the counts of Holland already issuing esterlins, replete with the English long cross? Looks like a hybrid imitation. ...Very, Very cool.
Thanks. Indeed, I recognized it as different than the normal pennies from the Dutch counts, with the different legend starting with GOD ... The contemporary Dutch pennies usually start with FCOM ... or WCOM. But, @AnYangMan knows way more about that than I do.
