Antoninianus - Probus Cuirassed, right; PROVIDENTIA AVG; Providentia

RIC 181 was minted by the 6^th officina (RTς) of the Rome mint (RTς). See for exergue mark ‘RTΓ’ below. The original RIC text mentions 1 variation/bust type (bust types according to Pierre Bastiens grouping of bust types; see illustrated: probvs.net):

1. Radiate, cuirassed, right (B bust, Guillemain (*) #497 (RTς), example: probuscoins.fr #2409, Numista #287827).

(*) Jean Guillemain, La Monetazione di Probo a Roma (276-282), Ripostiglio della Venèra-Nuovo Catalogo Illustrato Vol III/1, 2009.

According to Pink, RIC 181 – with its obverse lettering nr. 11 (‘PROBVS AVG’) combined with “PROVIDENTIA AVG” and exergue mark RTς – is part of the 7^th emission (year 282). See: Karl Pink, Der Aufbau der römischen Münzprägung in der Kaiserzeit VI/I, Wien, 1949, p. 47. In Guillemains categorization, it is part of the 5^th emission/series, minted during the summer of 282.

This coin is part of the AEQVITI series of Rome, in which the 6^th officina represents the letter T in the exergue. See on these coded series: Gert Boersema, The Translation of the Codewords AEQVITI, IOBI and HPKOY, Forumancientcoins.com, 2007.

RIC also mentions exergue mark ‘RTΓ’ but correctly states in the footnote "Probably ς misread". Indeed, this exergue mark cannot be correct because it is non-existent as is clear because of the fact that the 3^rd officina (officina letter: Γ) in this ‘AEQVITI-emission’ of Rome can only have exergue mark ‘RQΓ’ (the ‘Q’ being the 3^rd letter of AEQVITI). Also, the 3^rd officina did not mint ‘PROVIDENTIA AVG’ this emission.