Note 1: RIC breaks its own consistency rules by grouping coins
        with two different titulatures under this listing: 
        
        IMP C M AVR PROBVS P F INVICT AVG
        IMP C M AVR PROBVS INVICT AVG
        
          Longer & shorter titulature variants also exists:
        
        IMP C M AVR PROBVS P F INVIC AVG
        IMP C M AVR PROBVS P F INVICTVS AVG
          
        Note 2: An exceptional coin exists, which transposes
        titulature elements P F ⇄ INVICT
        It likely needs to be listed separately.
         
Chronology: 4th emission of Serdica, 277 CE (Pink) / 280-81 CE (Gysen).
| RIC 867 variant, Serdica. Bust type C,
                (A2).
                Denomination: Antoninianus. Not listed for this bust type, officina, and long legend in RIC. | 
| OBV.: IMP C M AVR PROBVS
                  P F INVICTVS AVG Radiate, draped and cuirassed bust right, seen from back. REV.: SOLI INVICTO      Cesures: S_OLI INVICT_O    Sol in spread quadriga, right hand raised, holding globe in left. Mintmark: // KA•A• [ No exergual line ] Weight: 3.89 g. Image provided courtesy of Paul-Francis Jacquier, JACQUIER NUMISMATIQUE ANTIQUE Jacquier Auction 38, 13.09.2013. | 
| RIC 867 variant, Serdica. Bust type C,
                (A2).
                Denomination: Antoninianus. Not listed for this bust type and officina in RIC. | 
| OBV.: IMP C M AVR PROBVS
                  P F INVIC AVG Radiate, draped and cuirassed bust right, seen from back. REV.: SOLI INVICTO Cesures: S_O_LI INVICT_O Sol in spread quadriga, right hand raised, holding globe in left. Mintmark: // KAB [ No exergual line ] Weight: 3.41 g. | 
| RIC 867 variant, Serdica. Bust type F,
                (B). Denomination:
                Antoninianus. Not listed for this officina in RIC. | 
| OBV.: IMP C M AVR PROBVS
                  INVICT AVG Radiate, cuirassed bust right. REV.: SOLI INVICTO Cesures: SOLI INVIC_T_O Sol in spread quadriga, right hand raised, holding globe in left. Mintmark: // KA•A• [ No exergual line ] Weight: 4.28 g. | 
| RIC 867 variant, Serdica. Bust type F,
                (B). Denomination:
                Antoninianus. Not listed for this officina in RIC. | 
| OBV.: IMP C M AVR PROBVS
                  INVICT AVG Radiate, cuirassed bust right. REV.: SOLI INVICTO Cesures: S_O_LI INVICT_O Sol in spread quadriga, right hand raised, holding globe in left. Mintmark: // KAB [ No exergual line ] Weight: 4.52 g. | 
| RIC 867 variant, Serdica. Bust type C,
                (A2).
                Denomination: Antoninianus. Not listed for this bust type and officina in RIC. | 
| OBV.: IMP
                  C M AVR PROBVS INVICT AVG Radiate, draped and cuirassed bust right, seen from back. REV.: SOLI INVICTO Cesures: SOLI INVICT_O Sol in spread quadriga, right hand raised, holding globe in left. Mintmark: // KA•Δ• [ No exergual line ] KA dot Delta dot Weight: 3.68 g. | 
| RIC 867 variant, Serdica. Bust type C,
                (A). Denomination:
                Antoninianus. Not listed for this bust type, officina, and transposed titulature elements in RIC. | 
| OBV.: IMP C M AVR PROBVS
                  INVICT P F AVG Transposed titulature elements P F INVICT Radiate, draped and cuirassed bust right, seen from front. REV.: SOLI INVICTO   Cesures: S_O_LI INVICT_O       Sol in spread quadriga, right hand raised, holding globe in left. Mintmark: // KAB [ No exergual line ] Weight: 3.66 g. Image provided courtesy of Philippe Gysen |