I scratched a long-held itch about 18 months ago when I bought a Kirium. 18 months later I get into fitness trackers and now have a smartwatch. I don't need two watches so I'm looking to sell the Kirium, but it's an unusual piece so I'm having a bit of trouble getting an idea of valuation. It has a smaller face with a green dial and is stamped WL5215. The only watch that shows up in my Googling for WL5215 is mine, from the original listing. The COSC certificate number is 1669194 and movement number 139585. I bought for £650. Be interested to know if that's still a reasonable valuation.