Gavin,
Here is a paper on Caucasian Axes. Other pics, etc. available by Googling on that topic. I have a reproduction from the area of same style of one of the Christie's sales. Not as elaborate, but it has remains of an iron inlayed snake and lightly engraved fish and other representations of their symbols of the Underworld.
https://archiv.ub.uni-heidelberg.de/...sus%202021.pdf
https://www.christies.com/en/lot/lot-5119849
Best,
Ed