Suspect Byzantion tetradrachm

[Cloudcuckoo]

Please take a look at this Lysimachos tetradrachm from Byzantion. Being sold by a dealer that has recently received attention for various suspect sales. The reason I have doubts is that the obverse not only appears to be a 'die match' for an example from The William Stancomb Collection that was sold by a different auction house last August, but seems to possess identical patterns of flow lines throughout. There are other features that concern me, such as a lack of crispness in the strike, but don't feel qualified to be certain.

Tetradrachm. In the name and types of Lysimachos, circa 75-65 BC. Byzantion. 15,66 g. 33 mm.
Obv: Diademed head of the deified Alexander right, with horn of Ammon.
Rev: BAΣIΛEΩΣ ΛΥΣΙΜΑΧΟΥ, Athena Nikephoros seated left, arm resting on shield, spear in background; ΑΔ monogram in left field, BY below throne, trident in exergue.
Callataӱ 1997, Groupe 3, p. 125, cf. D44-D53 (= Münz Zentrum sale 47, 1982, 59); HGC 3.2, 1406.


First image: coin in question
Second image: example from The William Stancomb Collection

[shanxi]

I don't know enough about this type to say something about the authenticity, but identical flow lines are possible. Flow lines are in the die, and coins which are produced at the same time should show the same flow lines.

[Joe Sermarini]

I see no reason for doubt.