Augustus (27 B.C. - 14 A.D.) - Silver Denarius - 17.95mm, 3.61gr - modern cast forgery.
Obverse - CAESAR AVGVSTVS DIVI F PATER PATRIAE
Augustus, his laureate head right
Reverse -  AVGVSTI F COS DESIG PRINC IVVENT
C L CAESARES  in Exergue
Caius and Lucius Caesar standing, each holding a shield and spear
between them, a lituus (on right) and simplum (on left)
above (each turned inward).
Image
Minted in Lugdunum (Lyon, France), 2 B.C.- 4 A.D., probably conitinued for several years afterwards.

Reference:
Sutherland, C.H.V.,"Roman Imperial Coinage", Volume 1, revised edition (RIC), p55, nr.207
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Volume 1, p317, nr.1597
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p96, nr.479
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain"(C), Volume 1, p69, nr. 43
Seaby, H.A., "Roman Silver Coins" (RSC), Volume 1, p134, nr.43.
Mattingly, H., "Coins of the Roman Empire in the British Museum", Volume 1 (BMC), p89, nr. 519, 524, 527
Van Meter, D., "Handbook of Roman Imperial Coins", p67, nr.51, variety (b.)
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II),  p10, nr.429 (B5, O40, R013, T042 Exe: C L CAESARES)
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II-Digital edition, Part I),  p9, nr.429
(B5, O40, R013, T042 Exe: C L CAESARES)
Kampmann, U., "Die Münzen der römischen Kaiserzeit" (K, 2e Auflage), p43, nr. 2.50, var. with lituus l and simplum r.

Quality: Very Fine+/Extra Fine-, but a modern cast forgery.
Rarity: C

How you can tell this is a modern cast copy:
        -The features on coin have a 'soapy' overall appearance
        -The metal of the coin appears to a low grade silver alloy or even an aloy containing tin or aluminium.
        -various casting bubbles are visible on the obverse of the coin