Skyles, King of Scythia. AE39, ca. 465-445 BC. 34.27 g. Nikonion mint. 

SKY, Owl standing left, head facing.
Wheel with four spokes, each with cross-member. B between two of the spokes.

Anokhin 568–569 var (denomination); Necheetaypo & Mechaypov 33-34 var (ditto).
Extremely rare, possibly unique in this denomination. 

With permission of cngcoins.com, auction 108, Lot 30, May 2018.

Anokhin_568–569_var