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
Of trades and manufactur es there is nothing to be said, except that the Italian nation in this respect persevered in an inaction bordering on barbarism. They destroyed the Corinthian factories, the depositories of so many valuable industrial traditions--not however that they might establish similar factories for themselves, but that they might buy up at extravagant prices such Corinthian vases of earthenware or copper and similar "antique works" as were preserved in Greek houses.
The trades that were still somewhat prosperous, such as those connected with building, were productive of hardly any benefit for the commonwealth, because here too the system of employing slaves in every more considerable undertaking intervened: in the construction of the Marcian aqueduct, for instance, the government concluded contracts for building and materials simultaneously with 3000 master-tradesmen, each of whom then performed the work contracted for with his band of slaves.
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Reference address : https://www.ellopos.net/elpenor/rome/4-11-commonwealth-economy.asp?pg=31