Finally settled for this one which has a nice portrait, is on a nice round flan and well centered, I think, with very good strike and metal quality. Bithynia, Calchedon: In the name and type of Lysimachus, ca. late third century BC. Diademed head of deified Alexander III right, with horn of Ammon / ΒΑΣΙΛΕΩΣ / ΛΥΣΙΜΑXOΥ, Athena seated left, Nike in right hand crowning royal name, resting left arm on grounded shield decorated with ridges and gorgoneion head boss, transverse spear beyond; monogram to inner left, bull charging left in exergue. I could not find many examples or information about this issue. If anyone can, please share information or post your coins from Bithynia.