I have tried to take pictures of the logo but they do not come thru very clear, i will try again and post today.
Check for the numbers under the butt plate, that will tell. If they match the other parts, factory, if not replacement. Although I have a 1919 250-3000 that the butt stock numbers are a little off of the serial number. I have two letters stating that no rifle ever left the factory with the butt stock number, and all the other numbers match the serial, so the consensus is they were factory.