✅ SOLVED Help with two rings, please!

[lenmac65]

I found these two rings on a beach earlier this week.

The first ring I believe is gold and is missing its stone. I don’t see any markings indicating the karat value, though I see fancy engraving of partial initials stating “O to P.” I also see this curious marking of 17 or 7 (see enlargement). Could this be a maker’s mark or perhaps a year? Is this some sort of indication of gold status? This ring looks old to me, but I am not very knowledgeable in this regard.

As for the second ring, I am actually seeking opinions whether it is indeed a ring. It looks like a ring and has what appear to be black stones around the entire edge. The only marking on the inside is the number 7, which I have no idea what that indicates. The outside is dull gray, while the inside is shinier and looks almost like some sort of silver plating. What do you think? Is this some sort of ring, or is it something altogether different?

Thanks for your comments and insights.

 

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[CASPER-2]

just old baking soda and water will give it a shine - but like i said - if the other 14k is silver - it will keep slowly turning
Ive had more than a few that have done that -

 

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[CASPER-2]

I have a gold testing kit and it is possible you drive right by me when you head east (I live right next to Ma turnpike rest stop)
- I could test anything needed real quick for you if you give me a heads up
ring shown was as found and i shined it up at least 3 times and finally gave it up - it is a class ring 10K - 1930 found on the Cape

 

[lenmac65]

I believe the one missing the stone is gold - darker color is due to silver being the added alloy to it
which they did in 100+ yrs ago with 10K

if silver is the added alloy - you can clean it but it will keep turning dark again - the silver will keep tarnishing slowly again and again
probably one of the reasons they went to other alloys - I hit mainly old beaches in the water and large % of my rings are old or very old gold

just old baking soda and water will give it a shine - but like i said - if the other 14k is silver - it will keep slowly turning
Ive had more than a few that have done that -

I have a gold testing kit and it is possible you drive right by me when you head east (I live right next to Ma turnpike rest stop)
- I could test anything needed real quick for you if you give me a heads up
ring shown was as found and i shined it up at least 3 times and finally gave it up - it is a class ring 10K - 1930 found on the Cape

Thank you for all the info and the offer to test; I appreciate it. I do have to get a kit myself someday though. That is a nice ring, even if dark.

 

[CASPER-2]

All have to think about this too for future reference - if you had a ring that was gold plated - if you had it engraved - the base metal would be carved into - which most likely would be brass - so writing would turn green especially in salt water - now 10k may turn green still in saltwater - never seen one turn in fresh
10K - whatever they used for solder made it turn green in saltwater