Who ever switched the butt plate did an excellent job, it looks original, like you say Dick the stock is pretty much toast anyway as far as restoring goes but aside from the monetary  value hopefully a step by step procedure will be able to take place for it's unique historical value. Realize it would never be more then a parts gun but if they are time accurate replacements and what is left of the original are somehow able to remain with 34644 so be it... we'll see where it's fate takes it.