I received this Winchester Model 70 from a good friend. Unfortunately the original box is long gone and I can't identify the particular series. I looked on the Winchester website, searching old and new models, but I couldn't find a picture of it. It has a 24" stainless sporter barrel, black synthetic stock, box magazine, no sights, and is chambered in 300 WSM. Also, the serial number is G 386978. Can anyone tell me the manufacturing date ? That might help identify the series. Thanks for any help.