This has probably been covered, but can anyone help me date the 1100 I just picked up? On the receiver there is no letter in front of the number. It is 273xxxV. It came with 3 barrels, two do not have any letters stamped on the left side near the receiver. One has A D W Z stamped in it. The stock has a white diamond on the bottom of the grip. Any suggestions on what year it may be from?