при поиске в гугле PHCKOY находятся монеты с аналогичным названием
http://www.grifterrec.com/coins/bosporus/bosporus.html
http://www.forumancientcoins.com/catalog/catalogfrm.asp?vpar=1097&pos=1&sold=1

при этом всплыло имя Rhescuporis (also Rascypolis, Rhascoupolis, Rhascupolis) http://en.wikipedia.org/wiki/Rhescuporis

поищите в гугле Rheskuporis... например
http://wildwinds.com/coins/greece/i.html отдел Bosporos
например http://www.wildwinds.com/coins/greece/bosporos/kings/rheskuporis_II/i.html
или http://www.numismall.com/CyberNumis/BOSPOROS-Rheskuporis-IV-240-276AD-Bil.-Stater-7.65grm-20.2mm-Year-563-266-267AD.html
BOSPOROS Rheskuporis IV 240-276AD Bil. Stater 7.65grm, 20.2mm Year 563 (+266/267AD) diademed bust right, trident before/Laur. & dr. busts of Valerian and Gallienus face to face, date below, Sear-5498 Where he states: "This late appearance of the portrait of Valerian is of some interest. It shows that dispite the Emperor's capture by the Persians several years before, he was still regarded as joint head of state in the Roman Empire, at least by eh king of Bosporus. Very nice Extra Fine.