The photograph on the left is a picture of the buttstock and buttplate of this 91/30 rifle.
The picture on the right is a some what important one to collectors. The stamping on the barrel was not applied by Russia, but rather it was done here in the states. This stamping is commonly called an "import marking" or "importers stamp". Now why is this stamp important? The answer is that many collectors strive to not only find a pristine specimen but also one that has not been changed or altered. Since this firearm is not like it was when it left the factory, the value of it has been diminished ever so slightly.
These import stamps originally started to appear by law in the late 1980's. Before that time, there were millions and millions of firearms imported into the U.S. that did not contain any type of import marking. This is an important fact to remember when purchasing a firearm from a seller that is claiming it is a vet bring back. All official "bring back" items will have proper documentation. With out these documents, one can never be sure of the story told by some sellers. An easy way to remember all of this is by the old saying "buy the item and not the story". What is meant by that is to evaluate the item for it's worth and to not pay extra for the story that may come along with it.