Russian, Dunilovo*, Star Seal

Star Seal, Image & Found by Plodite.
Found in Kent, 14mm Diam 4.2g.

Possibly Cyrillic script. A 5 pointed star is shown on one side.

*From Tanya Flow, "It's from Dunilovo, the letters are Ф. В. К.
I don't know what they mean... a better example.