In the 2006 Dealer catalog they are listed as new and four are in there . The 472, 473 are the 3 1/8" models, first has a gut hook . Then 478 and 479 are 3 7/8" models . For all I know they may have used the same sheath for all models . They stay the same until the 2010 catalog . Now they are named the Bucklite Max and the model 679 is 4" long and the 673 is 3 1/4 . But very near the same knife and no Diamondback . DM