Here is one from Njanear's M91/30 Collection :
At 5.62x54r.net a shorter, cloudy, though at the same time less speculative statement:Found stamped on the right side of the barrel shank parallel to the stock, this is thought to be a Finnish Arsenal mark indicating that the particular rifle was captured during the Continuation War (1939 to 1940) and/or was stored in the Finnish Arsenal for future issue in 1941.
The Mosin-Nagant.net version goes like this:"41" is believed to indicate the year 1941, but it's exact meaning is unclear. It possibly indicates repairs were made at that time.
Whatever, I have a 91/30 dated 1939 with the mark. It would have been made just in time for the Russians to lose as a capture in the war with the Finns. Thought I'd take a few snaps, having nothing better to do at the moment.There is an interesting marking that appears on these Finnish captured rifles, and it is a marking that has been debated a bit in collector's circles. This marking is a 41 and this marking appears on various Soviet rifles captured and re-issued to the Finns. Many have speculated this 41 represents the year 1941, so it was in 1941 that the rifles were reworked. Others have stated they have seen or own rifles that have dates later than 1941 that have this marking. As such I have never seen one with a date later than 1941. It can be rather safely assumed the 41 is indeed for the year 1941. It could indicate the year of rework or could have another meaning related to the year; however, this is not a common marking and it is possible it was only used for a short time in 1941. The Finns were indeed "experimenting" a bit with property markings in this time period, and this could well just be another example of this. Many that subscribe to the 41 as a date feel that rifles so marked can be identified as Winter War captures. That is not to say that all Winter War captures are so marked, just that some of the Finnish stockpile from the Winter War are identifiable in this manner. Whatever the meaning of the marking might be, the 41 stamped M91/30's are a nice addition to one's collection.
The rifle has a matching bolt, not forced matched, and the stock has been replaced with the Finn finger groove stock at some juncture.
However the 41 definition could use a little less speculation and more clarification as time goes on. Although for the Finns to get a 1939 Russian rifle by 1941, if that is a year, it would pretty much have to have been captured it would seem to me. However, the stock has definately been replaced by the Finns from the Russian one it must have been orignally equiped with.