AE 25 of Augustus & Agrippa - Crocodile chained to Palm Tree

AE 25 of Nemausus (Nimes) Obv: Heads of Augustus (Laureate) & Agrippa (Rostral Crown) back to back. Circular counter-mark on Augustus' face reads DDAP (?) IMP above DIVI F below. Rev: Crocodile chained to Palm Tree, palm branches below. COL NEM. RIC Vol I Page 44 Bought Thames Valley Coins Dec 1971.