At an auction a few years back I had purchased a box lot that contained what appeared to some type of harness leather, heavy chaps etc.. Had a definite horse odor. Anyway the leather was black and had to be 8-9 oz at least. I have made several sheaths from this material and I hope someone can tell me what type it may be? So far carbon knives after at least 3 years have not rusted in the least, and I never treated the leather, inside or out. I can add a pic of the leather, whats left of it if that would help. BUt it has an oily feel, not slick.