Just got a new-in-the-blister-pack Remington (Camillus) barlow with the green/yellow sawcut handles. I now have 5 of the 9500 series knives - two 9501 stockmans, the smaller two-bladed jack, the barlow, and a trapper. I noticed the back of the barlow and the trapper are very rough, as if no effort at all was put into smoothing all the liners and springs. They are uneven, like after the assembly was riveted together, that was it, done. On the two 9501s and the jack, the back of the knife is much more finished and smoother, although still far from the slick, polished finish on the back of a Case, for example. I wonder why the variation? Maybe the rough specimens were last-ditch products before Camillus went under?