Analysis of information sources in references of the Wikipedia article "Berenice II of Egypt" in English language version.
i. Queen Regnant of Cyrenaïca, ʙ.ᴄ. 258–247.
This review brings us to the accession of Berenice as queen of Cyrene, B.C. 258. Her coinage will be considered later (p. xlv.).
But it seems most probable that Berenice conceded a certain degree of autonomy to Cyrene, which included the right of coining;
Remarkably, Berenice was hailed basilissa on coins even in her father's lifetime,