Any help with any info on this ring

[isola]

I have this ring that my dad found in a park (I believe it was a park) at least 35 years ago. I'm pretty sure he said it was before I was born but I'm not positive.
It has USN with anchor emblem on it and there is no inscription other than 10k gold filled sterling top. I have no idea how old it is or if it even holds any value. Any info on this ring would be helpful.

 

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[isola]

Better pics

 

[CASPER-2]

Im thinking maybe 1950s

 

[Sandman]

It's a great ring.

 

[dirtwizard]

i may have found a match to your ring listed here for you to compare with
https://www.pinterest.com/pin/425168021041642763/?from_navigate=true

I'd keep it myself, but thats just me.