Coin depicted roughly twice actual size*
Bronze AE4, 16mm, 0.84gm, issued AD 337-340
Trier mint.
Obv: FL IVL HELENAE AVG, Bare-headed bust right.
Rev: PAX PVBLICA, Pax, draped, standing left, holding branch in right hand and transverse sceptre in left hand.
References:
See Sear 17491.