https://rpc.ashmus.ox.ac.uk/countermark/1161 

GIC —

D D with branch between (rectangular punch, on coins of Sicily)

rectangular 

6 x 3 mm 

Cossura (Sicily)

Marini-Pangerl -; separated from DD with branch between applied at Nemausus for geographic reasons and rectangular (not circular) punch. The puzzle of the countermark has been solved by the new evidence that Cossyra had become at municipium with decuriones: see R. J. A. Wilson, ‘Pantelleria Revealed: The Archaeology of Cossyra’, Mouseion III.17 (2020), pp. 515–545, at 539; R. J.A. Wilson, ‘Aspects of identity: Provincia Sicilia during the Roman Empire’, in O. Belvedere and J. Bergemann (eds.), Imperium Romanum: Romanization between Colonization and Globalization (Palermo, 2021), pp. 309-32, at 310-12