Questions

[Trapper340]

Found another ring with a mark of a ( u over a arrow ) looked it up it says.
uncas mfg.co Rhode Island 1911 - present.Large manufacturers of sterling and costume jewelry this mark was introduce in the mid 20s. It does say sterling on it .
The question is would it be sterling.

 

[Icewing]

If it says sterling that's probably what it is, unless you find a reason to believe otherwise, such as if it stuck to a magnet.
Nice find.

 

[Trapper340]

Cool that's # 4

 

[Rodbuster209]

Usually, but not always, when it says Sterling, it is. Nice find. Good luck!

 

[against the wind]

STERLING = 92.5% SILVER
Prior to the 1880's, jewelry was sometimes made from what was considered Coin Silver.
COIN SILVER = 90% SILVER
Congrats on a nice find.