Weird K and Arabic script hallmark on Art Nouveau 14k or 18K solid gold diamond ring

by Fox
(Alabama)

I have a natural diamond cluster ring that has an antique Art Nouveau appearance. The acid test shows a solid 14k, yet fades - though does not fully dissolve - with 18k acid. The hallmarks are of a weird "K" like symbol and what appears to be Arabic script inside the band. Any info would be wonderful. Thank you! :)