Unique ID: 81
This coin is Gallo Belgic D (GB-D) “RR” type, one of the excessively rare “legend” types. The GB-D quarter staters were minted in Belgic Gaul to finance resistance to Caesar during the Gallic Wars. The “A” type (62) is thought to have been minted in preparation for the final year of the war (51 BC), so it’s possible that the RR type was minted at the same time.
The type is defined by the vertically stacked RR legend on the obverse which is repeated in the reverse. The other “legend” GB-D quarters have either “A”, “AT”, “AR” or “ATR” on the obverse, depending on how you interpret the monogram. It is thought that these refer to the Atrebates. It is not known what the RR might have meant.
This is only the third example of this coin I have been able to find. It was generally thought to have been unique.
GB-D types in the collection: