I don't (yet) have a copy if the "BOOK" but I would suggest two options
post the serial number for someone to look up- there is a chance an upgrade is noted - last time I needed that help - I had the answer in a few minutes from one of the great members here.
or - send for a letter on the gun - the link is on the home page.
i can't claim to be an expert - one of them will comment eventully, but if that is original - that would be the best wood I have seen on a V
see - one chimed in whilst i was pecking at the keyboard
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