Diocletian. As Senior Augustus, A.D. 305-311/2. AE follis (26.9 mm, 9.99 g, 7 h). Serdica mint, struck A.D. 305-306. D N DIOCLETIANO FELICISSIMO SEN AVG, laureate bust of Diocletian right, wearing imperial mantle and holding olive branch and mappa / PROVIDENTIA DEORVM QVIES AVGG. , Providentia standing right raising hand; Quies standing left holding olive branch and scepter; S-A-F in fields, ·SM·SD· in exergue . RIC 15a. VF. Scarce.