The action was made in 1963/64, but Remington didn't start chambering the 700 in 25-06 until 1969/70, so it would seem reasonable to infer that is more likely to be a parts gun then it is to be an original factory specs gun.
There is a 2 or 3 digit assembly code of the left side of the barrel, just ahead of the receiver. The codes for 1963 and 1964 are "K" and "L".
Jeff
