Back around 1968, I purchased a Buck Nemo from Bill Jacksons in St Petersburg Fl, used it for years. Came across it in one of my old boxes... forgot I even had it. It's in really good condition, and I found out it is still very sharp! I wish I found out another way. Anyway, I bought the knife so I know it is a Nemo but there is no model #. It has a hole in the handle for a lanyard which I put in it when I was actively diving in Guam back around 1977. It has red/brown spacers in the handle. Only normal wear-and-tear. I lost the sheath somewhere along the line. My question is what is the difference between a Nemo with red/brown spacers, white spacers, and no spacers? I've been looking for an original Sheath ... so I don't cut myself again.