Herennius Etruscus AE23 potin tetradrachm of Alexandria, Egypt. AD 249-251. Dated year 2 of Trajan Decius. 13.31 g. 

K ERE ETR MEC DEKIOC KAICA, bare-headed, draped and cuirassed bust right.
LB, Herennius on horseback galloping right, wielding spear at fallen enemy beneath the horse

Milne -; Dattari (Savio) 5104; Emmett 3655. 

Very rare.

With permission of cngcoins.com, auction 111, Lot 599, May 2019