Nikaia in Bithynia, 222-235 AD., Severus Alexander, Diassarion, Rec. Gén. 283-4 var. / Howgego 788.

Nikaia (Nicaea) in Bithynia, Severus Alexander, 222-235 / 258 AD.,
Æ Diassarion (24-25 mm / 7,33 g), ca. 258 AD. retariffed by countermarks as Tetrassarion,
Obv.: M AYP CЄYH AΛЄΞANΔPOC AV , aureate, draped and cuirassed bust of Severus Alexander right, seen from behind, two circular countermarks on bust: value mark Δ (double strike).
Rev.: NIKAI - EΩN , Athena standing left, her left hand leaning on spear, her right holding phiale/patera; shield at her feet left.
Waddington, Rec. Gén. 1/3, 473, 283-4 var. (pl. LXXXII, 12-13) ; Weiser - ; for countermark cf. Weiser no. 28 ; Howgego 788 .