https://rpc.ashmus.ox.ac.uk/countermark/683 

GIC 554

ΝΙΚΟΜΗΔ

rectangular 

5.5–6.5 x 2–2.5 mm 

Uncertain (Uncertain)

Has been attributed to Cos, due to association with the GIC 355 Crab on a coin in Emerkingen. The inscription could then only be for a magistrate of the name of Nicomedes. One is known at Cos earlier, but not at this date. A more natural interpretation could be for Nicomedia?