Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
With equal if not greater rapidity the Roman silver coinage penetrated into Spain, where the great silver-mines existed and there was virtually no earlier national coinage; at a very early period the Spanish towns even began to coin after the Roman standard.(20)
20. III. VII. The State of Culture in Spain
On the whole, as Carthage coined only to a very limited extent,(21) there existed not a single important mint in addition to that of Rome in the region of the western Mediterranean, with the exception of that of Massilia and perhaps also those of the Illyrian Greeks in Apollonia and Dyrrhachium.
21. III. I. Comparison between Carthage and Rome
Accordingly, when the Romans began to establish themselves in the region of the Po, these mints were about 525 subjected to the Roman standard in such a way, that, while they retained the right of coining silver, they uniformly --and the Massiliots in particular--were led to adjust their --drachma-- to the weight of the Roman three-quarter -denarius-, which the Roman government on its part began to coin, primarily for the use of Upper Italy, under the name of the "coin of victory" (-victoriatus- ).
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Reference address : https://www.ellopos.net/elpenor/rome/3-12-management-land-capital.asp?pg=31