that of the Ai-Khanoum/Bactra mint. He proposes that the small series C was minted at the main mint in order to establish Diodotus II's position as heir apparent of the whole kingdom. After a break, both mints produce coins with the younger portrait and with the legend now ('Of Diodotus', 'series D & F'), whereas the legend on the earlier coins was ('Of King Antiochus'). Holt suggests that this break marks the death of Diodotus I and accession of Diodotus II. This shift in legends seems to reflect the final renunciation of Seleucid authority and a full proclamation of Bactrian independence. For the majority of his reign, Diodotus II issued coinage on a relatively modest scale. Towards the end of his reign, he began to mint on a much larger scale, with greater quantities of gold coinage than previously. This was accompanied by the production of an issue at the secondary mint, depicting the older figure of Diodotus I once more, but in a more idealised fashion ('series B'). Frank Holt proposes that these phenomena were a consequence of a civil war between Diodotus II and Euthydemus. He argues that the scale of minting indicates the need to provide coinage for a large number of soldiers—indicating some kind of military threat—while the series B coinage may have been intended to emphasise Diodotus II's legitimacy as son of the kingdom's founder. Diodotus II also issued a bronze coinage. Initially, this coinage bore the same obverse design as that of Diodotus I: head of Hermes wearing a petasus hat ('Series H'). However, the reverse design is new: a depiction of Athena resting on her spear and the introduction of a new legend, reading "Βασιλεωσ Διοδοτου" ("of King Diodotus"), as on the gold and silver coinage. The coinage consisted of four denominations: a 'double' (c. 8.4 grammes, 20-24 millimetres in diameter), a 'single' (4.2 g, 14–18 mm), a 'half' (2.1g, 10–12 mm), and a 'quarter' (1 g, 8–10 mm). Only the first two of these denominations seem to be attested under Diodotus I. The value of these denominations is uncertain; a single may have been worth 1/48 of a silver drachm. After this initial issue, Diodotus introduced a new set of designs ('Series I'). On the double and single denominations, these depict the head of Zeus on the obverse (except on one issue depicting a king—probably by accident), and the goddess Artemis on