Diadumenian, AE22 of Markianopolis, Moesia Inf.

M OPELLIOS ANTWNEINOS K, bare head right.
MARKIANOPOLEITWN, Hygieia standing right, feeding serpent 
in arms. 

Varbanov 1344 corr (obv. legend) (this coin illustrated).

With permission of Numismatic Lanz 2002, lot 607.

Note: Varbanov 1344 gives obv. legend without the final
K in error, though this coin with K is the one illustrated.