Augustus (27 B.C. - 14 A.D.) - minted posthumously under Gaius (Caligula)
Brass Dupondius - 28mm, 12.03g

Obverse -DIVVS AVGVSTVS S C
Augustus, his radiate head left.
Reverse - CONSENSV SENAT ET EQ ORDIN P Q R
Caligula (or Augustus), laureate and togate, seated left on curule chair,
holding branch in left hand, right hand at side.
Image
Minted in Rome between 37 and 41 A.D. under Gaius (Caligula).

Reference:
Sutherland, C.H.V., "Roman Imperial Coinage", Volume 1, revised edition (RIC), p112, nr.56. (under Gaius).
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Volume 1, p357, nr.1811. (under Caligula)
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p99, nr.528 (under Augustus).
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 1, p76, nr 87 (under Augustus).
Mattingly, H., "Coins of the Roman Empire in the British Museum", Volume 1 (BMC), p160, nr. 88-92.
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II),  p6, nr.125 (B5, O50, R046, T018)
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II-digital),  p6, nr.125 (B5, O50, R046, T018)
Van Meter, D., "Handbook of Roman Imperial Coins" (VM), p73, nr. 161 (under Augustus).

Quality: about Very Fine (harshly cleaned and possibly tooled)
Rarity: C (Common)