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
The robe, the
ring, and the amulet-case distinguished not only the burgess and the
burgess's wife from the foreigner and the slave, but also the person
who was free-born from one who had been a slave, the son of free-born,
from the son of manumitted, parents, the son of the knight and the
senator from the common burgess, the descendant of a curule house from
the common senator(49)--and this in a community where all that was
good and great was the work of civil equality!
The dissension in the community was reflected in the ranks of the
opposition. Resting on the support of the farmers, the patriots
raised a loud cry for reform; resting on the support of the mob in
the capital, demagogism began its work. Although the two tendencies
do not admit of being wholly separated but in various respects go hand
in hand, it will be necessary to consider them apart.