I just picked up a 95% model 81 in .300 Sav.; it has a Stith side/barrel "Streamlined" mount, with a 2 3/4 Kollmorgen with fine cross-hairs and dot, very nice wood, factory checkering, perfect blueing, and a Lyman tang sight. One of O'Connor's books mention that the 81's were take-downs. I don't see evidence of takedown; anybody know anything about this? I understand that these came in different grades- anybody know how to tell these apart? Fjestad's book says that the date code is 7/49.