I have a 101 in 20gauge and according to the blue book and other sources of information, they were made in 1966 and 1967. The serial# is 252xxx but, according to the books, the last of the guns made in 1967 were Serial#210,500 and below. If this is correct, then how could my gun be #252xxx? Can anyone help me here??? Was there a later production run of these shotguns. Thanks, 28-7