Just got this rifle and know its something special but not sure how special and what its worth. Its Sn# is in the 40000 range and its a 303. I believe it has what is the highest grade of engraving that was offered at the time. It has an octagon barrel and is in excellent condition. I would like to know what i have here. Any info would be helpful thank u. If i new how to put a picture on here i would