Well that is interesting!  As far as the stock, there is an indention on top of the stock where the original butt plate was removed.  I agree, it is probably original, but maybe altered.  I'll have to take the replacement off and see what I can find under it.  The marks in the metal is interesting too.  It also looked to me like someone removed or ground the outer layer off.  If you can see the Model 189? your eyes are better than mine.  Did many people remove the original markings?  I got this from an aunt after an uncle died.  He used it for elk hunting, I guess for years.  I've had it for at least 25 years and have shot it some.  If the outer layer of steel is removed will that weaken it to the point of being dangerous (and I know there are many varibles here)?  I do appreciate the help!  Thanks, Lorren