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 history of Italian writing thus furnishes in the first place a confirmation of the weak and indirect influence exercised by the Greek character over the Sabellians as compared with the more western peoples. The fact that the former received their alphabet from the Etruscans and not from the Romans is probably to be explained by supposing that they already possessed it before they entered upon their migration along the ridge of the Apennines, and that therefore the Sabines as well as Samnites carried it along with them from the mother-land to their new abodes.
On the other hand this history of writing contains a salutary warning against the adoption of the hypothesis, originated by the later Roman culture in its devotedness to Etruscan mysticism and antiquarian trifling, and patiently repeated by modern and even very recent inquirers, that Roman civilization derived its germ and its pith from Etruria. If this were the truth, some trace of it ought to be more especially apparent in this field; but on the contrary the germ of the Latin art of writing was Greek, and its development was so national, that it did not even adopt the very desirable Etruscan sign for -"f".(20)
20. The enigma as to how the Latins came to employ the Greek sign corresponding to -v for the -f quite different in sound, has been solved by the bracelet of Praeneste (xiv. Developments Of Alphabets in Italy, note) with its -fhefhaked- for -fecit-, and thereby at the same time the derivation of the Latin alphabet from the Chalcidian colonies of Lower Italy has been confirmed. For in a Boeotian inscription belonging to the same alphabet we find in the word -fhekadamoe-(Gustav Meyer, Griech. Grammatik, sec. 244, ap. fin.) the same combination of sound, and an aspirated v might certainly approximate in sound to the Latin -f.
Indeed, where there is an appearance of borrowing, as in the numeral signs, it is on the part of the Etruscans, who took over from the Romans at least the sign for 50.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/1-14-measuring-writing.asp?pg=28