Anonymous, AE19, Festival of Isis issue, 2.52 g. AD 360-363. 

DEO SERAPIDI, radiate and draped bust of Serapis right, 
modius on head.
VOTA PVBLICA, Isis, standing left, holding sistrum and 
the draped bust of Serapis.

Alföldi 195a; SNRIS V106a (this coin).

Sold by Gorny & Mosch auction 247, Lot 4685, March 2017.