Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1397 
Martini, Pangerl 15
D D with branch between, border of dots (circular punch, on coins of Gaul)
circular 
8 mm 
D(ecurionum) D(ecreto) = ‘By decreee of the Decurions’ - the decurions were the local senate. Separated from DD with branch between from Cossura for geographic reason and circular (not rectangular) punch 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 523 Show 523 141 1
RPC I, 523 Show 523 152 1
RPC I, 523 Show 523 154 1
RPC I, 524 Show 524 240 1
RPC I, 523 Show 523 157 1
RPC I, 523 Show 523 158 1
RPC I, 523 Show 523 162 1
RPC I, 523 Show 523 164 1
RPC I, 523 Show 523 165 1
RPC I, 523 Show 523 183 1
RPC I, 523 Show 523 166 1
RPC I, 523 Show 523 170 1
RPC I, 523 Show 523 171 1
RPC I, 523 Show 523 177 1
RPC I, 523 Show 523 168 1
RPC I, 523 Show 523 178 1
RPC I, 523 Show 523 182 1