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 brave and prudent conduct of the insurrection by the heroic family of the Maccabees and the internal dissension in the Syrian empire did more for them than the letters of their powerful allies; during the strife between the Syrian kings Trypho and Demetrius Nicator autonomy and exemption from tribute were formally accorded to the Jews (612); and soon afterwards the head of the Maccabaean house, Simon son of Mattathias, was even formally acknowledged by the nation as well as by the Syrian great-king as high priest and prince of Israel (615).(39)
39. From him proceed the coins with the inscription "Shekel Israel," and the date of the "holy Jerusalem," or the "deliverance of Sion." The similar coins with the name of Simon, the prince (Nessi) of Israel, belong not to him, but to Bar-Cochba the leader of the insurgents in the time of Hadrian.
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Reference address : https://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=106