Browsing e-bay i find that German dealer Lanz is offering a lot (>20) of coins of this type in individual auctions. Like
this one. These are both Drachm and half drachm types.
Looking better at these however, i am concerned. This because all these specimen seem to be die identical. And although the opening post picture in this thread is not super clear, i also think it is die identical to the ones offered by Lanz. Even more so, also on Zeno multiple die identical specimen are present. This worries me a lot as i can not imagine any recently discovered hoard to be almost fully comprized of die identical specimen.
Looking at the Lanz specimen, some have strange wear patterns, with deeply struck parts right next to relatively flat spots. This suggests that the surface of these were subject to physical treament (hammering) after striking.
Although i can not be fully sure these coins are fake, i thought it would be good to express my doubts in public. So possibly interested collectors can form their own opinion.