Macrinus (217-218 A.D.) - Silver Denarius - 21.21x19.05mm, 2.81gr
Obverse - IMP C M OPEL SEV MACRINVS AVG
Macrinus, his laureate and cuirassed bust right
Reverse - PONTIF MAX TR P COS PP
Fides standing front, head right, right foot on helmet,
holding standard in each hand.

Minted in Rome between April and December 217 A.D.

Reference:
Mattingly, H & Sydenham, E.A., "Roman Imperial Coinage", Volume 4, Part 2 (RIC), p7, nr. 22a.
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Vol. 2, p584, nr. 7345.
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 4, p295, nr. 60.
Seaby, H.A. & Sear, D.R., "Roman Silver Coins" (RSC), Volume 3, p104,  nr. 60.
Mattingly, Carson & Hill, "Coins of the Roman Empire in the British Museum", Volume 5 (BMC), p500, nr. 38.
Van Meter, D., "Handbook of Roman Imperial Coins", p204, nr. 20/2.
Suarez, R., "ERIC II - The Encyclopedia of Roman Imperial Coins" (ERIC II),  p373, nr.69, (B1, O1, R13, T9)

Quality: Very Fine+
Rarity: R