Trichryson - Ptolemy II Alexandria

The trichryson — worth three gold chrysoi — was part of Ptolemy II's aggressive monetary program launched at the very start of his sole reign, designed to assert financial independence from the Macedonian weight standards that had governed Hellenistic coinage since Alexander. By adopting a lighter Phoenician-based standard, Ptolemy effectively locked Egyptian coinage into a closed currency system, forcing merchants operating within the kingdom to exchange foreign coin at the palace's rate.

Svoronos 573 places this among the earliest Alexandria issues of the reign, a dating supported by Lorber's die study linking it to the transitional period immediately following Ptolemy I's death in 282 BC.