This denarius of Vespasian is interesting because of the reverse. The reverse features Nemesis walking with a snake. This reverse was also used earlier by Claudius. In fact, Vespasian revived many of the earlier coin types for his own coinage.
The other interesting fact about this denarius is the provenance. This coin once belonged to E. E. Clain-Stefanelli. She was senior Curator of the National Numismatic Collection in the Numismatics Division of the National Museum of American History, Smithsonian Institution, Washington, DC. She also published works concerning ancient coins and their history.
Vespasian, 69-79 A.D. AR Denarius, 3.16g. 21.41mm. Rome, 73 A.D.
Obv: IMP CAES VESP AVG CENS. Laureate head of Vespasian to right.
Rev: MAXIM PONTIF. Nemesis walking to right holding caduceus over snake.
C 385, RIC 544. SRCV I (2000) 2304
Ex: E. E. Clain-Stefanelli collection. Ex: Numismatica Ars Classica - Auction 92 Part 2, Lot 2133 May 24, 2016; Ex: Ed waddell