Watch List notes:

Diocletian. As Senior Augustus, A.D. 305-311/2. BI follis (27.4 mm, 9.25 g, 12 h). Rome mint, Struck A.D. 305/6. 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 branch and scepter; S - F // RS . RIC VI 119a. VF, well-struck and centered on somewhat oversize flan; "uncleaned", original (looks untouched) green and tan encrustations on both sides. Rare.

RIC does not list this legend variety for this type - it also does not give Diocletian officina S ("S only" on Maximian's abdication folles)