New one on me, Joe. What are the over all dimensions? Could be container of some sort for an oiler & maybe a bore brush,or even to hold a few cartridges ( and is missing it's outside cloth cover/pouch) ??? Is it all brass? It's obviously missing the "cap" for the threaded opening Does the opening go to a sealed container portion of the item ? Did your source in Russia have any idea of what it does ? I would guess it's of foreign manufacture. If it was a S&W factory product, we would have seen specimens before now. Ed. (PS: Are the threads metric or SAE ? )