Hi Stu, sorry no input as to your question, but I can't help but give your dagger two thumbs up!
To my eyes, it is one of the most beautiful jambiyas I've ever seen! Love the silverwork. From the enclosed pictures, the hilt looks to be rhinoceros? Normally, I'm not so much into the darker rhino types, would then rather prefer buffalo, but in this case it just goes so very well together with the dark scabbard and the silverwork. Very sexy!
Thanks for sharing!
All the best, - Thor