The 1973 Dimalla treasure and the changeover of the Hellenistic to the imperial coinage at Apollonia in Illyria

A new study of the 87 coins (29 silver and 58 bronze) of Apollonia in Illyr ia which comprise the Dimalla treasure. The silver coins have as types a he ad of Apollo on the right and three nymphs dancing around the hearth of the Nympaeon on the reverse, with names of mint officers (which are not those of the prytaneis), and having the same weight as the Roman denier. The bron ze coins revert to the types that preceded the great 1st c. monetary reform , but with different mint officers, names and above all different weights, which are exactly the same as those of the Roman bronze coins, and probably struck at Corinth by the praefectus of Antonius' fleet, Atratinus. This sh ows that Apollonia created its own monetary system between 38 and 36 BC, ad apting it to the standards of the denier and the new Roman bronze coinage.