I just took a look at Sheedy and coin #66 is this coin in the British Museum:
https://www.britishmuseum.org/collection/object/C_1938-1007-179
It was donated to the BM by Stanley Robinson in 1938 and the accompanying ticket has "Lesbos hoard" written on it. That could point to either a Cycladic or Asia Minor or Lesbos origin. Sheedy mentions this coin in one sentence. He seems to accept the attribution to Naxos but a footnote says "A study of this coin is to be published by E. Kosmidou." Sheedy might have accepted the BM attribution for now, waiting for Kosmidou to evaluate it more thoroughly. I can't find a publication of this coin by E. Kosmidou, so the publication is probably still pending. E. Kosmidou must be Elpida Kosmidou.
https://ucl.academia.edu/ElpidaKosmidou
Perhaps someone could contact her and ask her current thoughts on the attribution of this coin type, particularly with the new examples that have appeared on the market since Sheedy's study was published.