The County of Loon was a fief of the Prince Bishopric of Liege from 1193 until its complete incorporation under the authority of the Prince-Bishop around 1366.
The Counts of Loon minted coins under their authority from the mid-1200s until 1361
https://www.acsearch.info/search.html?id=5088179
https://www.acsearch.info/search.html?id=5088202
Currency appears to have been the Groot / Gros.
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