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
Macedonia and the Pseudo-Phillip - Victory of Metellus
Macedonia also disappeared about the same time as Carthage from the ranks of the nations. The four small confederacies, into which the wisdom of the Roman senate had parcelled out the ancient kingdom, could not live at peace either internally or one with another. How matters stood in the country appears from a single accidentally mentioned occurrence at Phacus, where the whole governing council of one of these confederacies were murdered on the instigation of one Damasippus. Neither the commissions sent by the senate (590), nor the foreign arbiters, such as Scipio Aemilianus (603) called in after the Greek fashion by the Macedonians, were able to establish any tolerable order.
Suddenly there appeared in Thrace a young man, who called himself Philip the son of king Perseus, whom he strikingly resembled, and of the Syrian Laodice. He had passed his youth in the Mysian town of Adramytium; there he asserted that he had preserved the sure proofs of his illustrious descent. With these he had, after a vain attempt to obtain recognition in his native country, resorted to Demetrius Soter, king of Syria, his mother's brother. There were in fact some who believed the Adramytene or professed to believe him, and urged the king either to reinstate the prince in his hereditary kingdom or to cede to him the crown of Syria; whereupon Demetrius, to put an end to the foolish proceedings, arrested the pretender and sent him to the Romans.
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Reference address : https://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=68