This coin is not listed in RIC or Bastien's Le Monnayage de L'Atelier de Lyon...I know of at least one other example though. It should come after RIC VII Lyons 54. This coin was probably struck during the 1st civil war between Constantine and Licinius, or at least during the lead up to it, as this series is not known for Licinius. The special martial bust might also indicate it was struck during the war. Because of the scarcity, it also seems probable this was one of the later coins struck before the temporary mint closure in 316—so, probably minted during the hostilities. The mint opened back up in A.D. 318/9. This series is also the last appearance of Sol on Lyons coinage. Constantine I A.D. 316 16x17mm 3.6g CONSTANTINVS P AVG; laureate and cuirassed bust right with spear over right shoulder and shield on left. SOLI INVICTO COMITI; Sol rad., raising r. hand, globe in l.; stg. l., chlamys across l. shoulder; across fields A- S. in ex. PLG RIC VII Lyons -; Bastien --
Constantine the Great AE Follis 315 - 316 A.D., Lugdunum Mint, 1st Officina 2.78g, 20.5mm, 12H Obverse: IMP CONSTANTINVS AVG, Bust of Constantine I, laureate, cuirassed, right Reverse: SOLI INVIC-TO COMITI, Sol, radiate, standing left, chlamys draped across left shoulder, raising right hand and holding globe in left hand Exergue: TF/✱//PLG Provenance: Ex. FSR Bargain Bin 2019 Reference: RIC VII Lugdunum 34
Interesting coin and suggestion. That example in NOT IN RIC is a bargain at five euros. Once again Lyon comes through with an interesting and unusual take on the Sol Invictus coinage.
These are both in RIC, but they date from before the closing of the mint: Lugdunum (Lyons) mint, A.D. 314-315 RIC 12 Obv: IMP CONSTANTINVS P F AVG Rev: MARTI CON-SERVATORI - Helmeted soldier in military dress holding reverse spear, resting hand on shield PLG in exergue; T in left field, F in right 20 mm, 3.4 g. Lugdunum mint, A.D. 315-316 RIC 34 Obv: CONSTANTINVS AVG Rev: SOLI INVIC-TO COMITI - Sol raising right hand, globe in left PLG in exergue; TF in left field, star in right 19 mm, 3.0 g.