I have two Kershaw model 1030 Deer Hunters and each have different sheaths and different markings. One has a single strap sheath and all the markings are on one side of the blade. The other has a sheath with double retainer straps. One side of the blade is marked "Kershaw", while the other side is marked "1030 Japan." Anyone have any idea which one was made first and/or when the markings changed? Is this model still made?