I purchased this K10 yellow gold item from Milleflora last month☆ It has a K10 hallmark. I've only worn it once. There doesn't seem to be any major noticeable damage. The backings are unused. It's a lovely sun-like motif♡ Please see the images for the size. It doesn't come with a case or box, but it does come with a pouch! Please read my profile before purchasing! Thank you very much (⁠^⁠^⁠) Those who like Jewelry Tsutsumi might also like this!