TYPE Byzantine Empire, Justin I and Justinian I joint reign (Apr. - Aug. 527 AD), bronze follis, Constantinople mint DESCRIPTION . Obv: Diademed emperor's bust to right, Latin legend D N [IVSTIN E IV]STINIAN PP AVG Rev: Denomination (M = 40 nummi), crosses above and to right, officina "delta" and mintmark CON at the botom REFERENCE: SB 125 GRADING: AF / VG, mostly brown surface, scarce ORDER INFO: B1189, $50 The formal elevation of Justinian, the able nephew of Justin I, to the rank of co-emperor, ensured a smooth succession, and produced scarce joint issues during the few months prior to Justin's death.