I made an attempt at creating the first Doctor's signet ring, used for various things in the Hartnell years, this was difficult to do, me not being a ring maker but even though it may not be supremely accurate I think it's ok.
I think it's an excellent likeness. Sure, some fine tuning to be screen accurate---but it's unique enough that I eyed it right off from a pile of thumbs. Great work!!! I'd love to get my hands on one.