I ran across this Sako AIII and had a couple of questions about it. First, is this stock design very common on Sako rifles of that vintage? The Monte Carlo cheekpiece seems really extreme, greatly-raised and angular--a little off-putting to my more-traditional tastes. The Serial No. is 535XXX. Can someone give me the date of manufacture? I'm guessing somewhere in the late 1970s, but that's just a guess. It's a 270 Deluxe and appears to be in pretty good shape (but again just a guess). Any idea of its current value on the used-gun market?