Perseus, King of Macedonia. AE20. 179-168 BC. Pella or Amphipolis mint. 5.54 g. 

Head of Perseus right in winged helmet, harpa before head.
B-A across upper fields, eagle standing front on thunderbolt, head right, wings spread. 
ER monogram in left field, GH monogram in right field, S below. 

SNG Munich 1209; Portolos 1265-1266.

With permission of Solidus Numismatik Auction 27, Lot 100, March 2018.