In the last couple of months I bought my first 5 Randall knives, most of which are 7 inch blades plus. This Model 24 I want to love it but somehow I don't. So I decided to let it go (this is not a for sale post) but before doing that I would like to learn about its possible age and why the sheath is dark brown. I haven't been able to find this of color sheath and thread color online.