I placed this question on the bolt forum, with some help, but I am still curious. I have put a Winchester 70 in 7MM Rem Mag on layaway. The bottom metal is the older 2 peice style with 3 screws. The bolt shroud is round on both sides with a small set screw on the "collar", and does not have the flat spot milled onto it like my newer Win 70. The metal work seems nicer that my newer gun, as does the wood. The serial number starts with G107----. and is 6 digits including the letter G. The gun is left handed also. The dealer has looked at the Blue Book and we were not able to determine the year. Any help would be appreciated. Thanks Curly.