My neighbor has a shotgun ,that belonged to his dad ,that needs some work. So naturally he brought it to the "gun guy".
I did a google search, hoping to find an exploded view, or some info on it and didn't come up with anything.  I was hoping someone here might have some info.

It's 12 ga. SxS
The only markings on it are:
On the bottom of both barrels  W&R
On top of the right barrel    Special Smokeless Steel
"Inside" the frame    PAT'D  FEB7-1911  and a serial #

That's all the markings I can see.  This thing has been in a closet for years and needs a good cleaning too.


EDIT  After a little cleaning the side of the frame has  keystone arms co.



Any and all info would greatly apprieciated.