Help identifying ring Hallmark

[tcornel]

Does anyone recognize this hallmark on the ring recovered from the ocean. I suspect it is titanium but trying to make sure.

 

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[49er12]

Nice finds Tom , minelab machine hard at work, oh if you don’t mind tell buck I said he’ll he remember me from talking to him at bull park when he worked special events, actually I first met him a few years ago at the dam shore December day in transfer, does he have a page to contact him, thanks show more of your finds Tom, John and I still find silver dimes, war nickel, buffalo, and yesterday buttons from army uniforms, thanks

 

[Tom Slick]

I don't know about the Hallmark but it doesn't have the look (color) of Titanium. I've seen quite a bit of the stuff over the years as an ex Aerospace Machinist.