Silver ring ?

[okwaho]

I just found my second silver ring.
The first one was easy to identify as the 925 stamped inside means sterling silver.
This new find I am not so sure about.
it is stamped

WA STER.

As best i can tell this might mean Washington Sterling, but i am not sure.

Can anyone help with this stamping ?

 

[ojm bc]

W.A
William Adams Ltd,
Birmingham 1940 hallmark

 

[okwaho]

WOW..
I guess that makes thi an old ring.
Thank you