* Regal K: This likely indicates that the ring is gold plated, with "K" standing for karat. Karat is a measure of gold purity, so "Regal K" suggests it has a layer of gold plating. Without a number before the "K," it's difficult to determine the exact purity or thickness of the gold plating.
* Indej: This could be a brand name, a manufacturer's mark, or a designator specific to the ring's style or collection.
Therefore, the marking indicates that the ring is gold plated and likely comes from a manufacturer or brand called "Indej".