Thanks a ton Charlie, this data sheet is exactly what I need. I am blown away by the amount of help you have provided memy carbine does have a Winchester Barrel and the witness mark on the barrel does line up with the witness mark on the receiver. I don't know if that would technically mean that my Barrel is original to the receiver.I have seen other receivers out there that have more than one witness Mark but my receiver only has one witness mark.my Barrel has no date but it does have the Winchester proof Mark located on the barrel underneath where the barrel band is. Thanks again Charlie, I owe you a lot. The finish on my barrel seems to match the finish on my receiver perfectly. The finish on my carbine is not great, you can tell she has been there and done that lol