A very nice AE Grade indeed, and extremely rare with so much of the original finihes still intact; congratulations. If you don't mind, what is the serial number? I can determine the gun to be a late production "3rd Model" example, so assume (since a 12-bore) the serial number to be above 335XX and to have been manufactured at some point between late 1903, and the end of production in early 1905.