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
The Proletariate and the Equestrian Order under the Restoration
While the restored government was thus careful thoroughly to eradicate the germs of improvement which existed in the Gracchan constitution, it remained completely powerless in presence of the hostile powers that had been, not for the general weal, aroused by Gracchus.
The proletariate of the capital continued to have a recognized title to aliment; the senate likewise acquiesced in the taking of the jurymen from the mercantile order, repugnant though this yoke was to the better and prouder portion of the aristocracy. The fetters which the aristocracy wore did not beseem its dignity; but we do not find that it seriously set itself to get rid of them. The law of Marcus Aemilius Scaurus in 632, which at least enforced the constitutional restrictions on the suffrage of freedmen, was for long the only attempt--and that a very tame one--on the part of the senatorial government once more to restrain their mob-tyrants.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/4-04-rule-restoration.asp?pg=10