I have a book called, "The Mosin-Nagant Rifle" by Terence W. Lapin.
On Page 20, in reference to Finnish made Stocks; He states that Stocks made in, or after the late 1930's, were somewhat darker due to being stained with potassium permanganate dye.
Yeah they mentioned something similar but I couldn't remember the ingredient. Thanks for adding that, much appreciated.
It's the texture of the finish that is difficult to attain. I have an SA rebarreled, hex receiver 91/30 with a replacement stock. The texture of the finish is definitely not shiney or clear. The M28 I gave to my step son also didn't have a clear or shiny stock. I am already missing that rifle. Shot better than I could hold it.