★ Rare ★

Johannes (423-425), AE4. Rome, 1.37g, 12mm.
Obv: D N IOHANNES P F AVG; Diademed, draped and cuirassed bust right.
Rev: SALVS REIPVBLICE; Victory advancing left, holding trophy over right shoulder, dragging captive with left hand; staurogram to left, R M in ex.
RIC 1916.
From the Severus Alexander collection; ex Brian Bucklan.
Clear name and a decent portrait; the green is stable verdigris.