Unless you're going to add the leather straps, I think it looks just fine as it is.
If you really just need to scratch that 'need to tweak it more' itch, maybe try some dodge/burn on the texture to bring out the 'grain' of the bone a bit more, make it a little more worn in. Once you settle on the inscription, try adding a little more contrast around the letters, some deeper shadows and some more prominent highlights here and there do give it some depth and sheen.