ISTROS, Stater or Drachm, 400-350 BC, Two facg hds, left inverted/Eagle atop dolphin, A below, as S1669 (£225); Nice EF, good centering & strike with heads complete & well detailed; decent bright silver. Much above average. Some scholars suggest the heads represent the Dioskuroi. Others say Bert & Ernie. (An EF sold for $3458, NAC 5/14.)