Nice recovery! 18 seems to be a key gold ring id for me personally. Clive claims 14 is and I believe it since it is a solid tab number.
I have found more rings with the equinox than the ATP and deus combined .22 seems to be a good one for me . Three rings at 22 all plated though . My dues found a 1950 women's class ring 45 and I was not the one using it . This tiny thing is my first real gold ring and black hills gold is not worth much . It is not plated and 10k and it will not fit the tip of my pinky finger, falls right off . If it is for a baby maybe it is older ? Now days you would think osha baby patrol would be all over the choking hazard . Could be a charm ring to a necklace ? Is that a thing ?
You don't want to pass up the lower IDs, my best ever 18K bracelet came in at a repeatable 4. Others have noted finding nice gold as low as 1 and high of 19. My 18K wedding band is a solid 18. I looked for the chart someone posted and if I remember correctly they had gold rings in the 3 to 19 range plotted out. I'll keep looking for the chart tomorrow.