Antoninianus - Probus Helmeted, cuirassed left, spear and shield; ADVENTVS AVG

According to RIC, RIC 629 was minted by the first (XXIP) to the sixth (XXIVI) officina of the Siscia mint. The original RIC text mentions 3 different variations/different bust types (bust types according to Pierre Bastiens grouping of bust types; see illustrated: probvs.net) (*), and there are also multiple variants known:

1. helmeted, radiate, cuirassed, left, holding spear in right hand and shield in left hand (E1 bust, Alföldi (**) 005.083-088 (example: probuscoins.fr #2920), Numista #292985);
2. radiate, wearing imperial mantle, left, holding sceptre surmounted by eagle in right hand (H2 bust, Alföldi 005.065-071 (example: probuscoins.fr #370), Numista #415783);
3. radiate, cuirassed, left, holding spear in right hand and shield in left hand (F1 bust, Alföldi 005.077-082 (example: probuscoins.fr #3550), Numista #415784);
4. [var] radiate, cuirassed, left, holding spear in right hand and shield in left hand, from behind (F8 bust, Alföldi - (example: probuscoins.fr #3851), Numista #415786);
5. [var] helmeted, radiate, cuirassed bust left, holding spear and shield, from behind (E2 bust, Alföldi 005.089 (example: probuscoins.fr #3969), not in Numista);
6. [var] radiate, cuirassed, left, holding spear (F5 bust, Alföldi 005.072-076 (example: probuscoins.fr #4990), not in Numista).

(*) OCRE mistakenly only lists the F1 variation/bust type.

(**) Andreas Alföldi, Vorarbeiten zu einem Corpus der in Siscia geprägten römischen Kaisermünzen. Heft V. Verzeichnis der Antoniniane des Kaisers Probus, Budapest, 1939.

According to Pink, RIC 629, with its obverse legend nr. 2 ('IMP C M AVR PROBVS P AVG') is part of the 5th (exergue-/officina mark style: -/-//XXIT) emission, which was in the year 278 (Karl Pink, Der Aufbau der römischen Münzprägung in der Kaiserzeit VI/I, Wien, 1949, p. 52). RIC also lists exergue-/officina mark T/-//XXI, which is also listed by Alföldi (005.072 and 005.073). According to Pink, the letter T, as field mark for the third officina, was only used in Siscia as part of the 7th emission (year 280). However, Pink does not list 'ADVENTVS AVG' being used during the 7th emission.