INDO-PARTHIANS. Margiana or Sogdiana mint. Uncertain ruler. Late 1st century B.C.-early 1st century A.D. AR drachm. 1.74 gm. 18 mm. "Helmeted" countermark issue imitating countermarked drachms of Phraates IV of Parthia. Diademed and draped bust left; eagle to left, holding wreath, behind; circular "countermark" of helmeted king to right on neck / Archer (Arsakes I) seated right on throne, holding bow. Senior 199.2D. Cf. Sellwood 91.13 for prototype. Sunrise 494. HGC 12, 520. Good Very Fine; attractively toned; unusually well centered and complete design; some minor deposits on reverse.