From top to bottom:
- Harder & thinner with satin finish and chamfered spine
- Standard HT and thicker with acid wash finish and swedge
- Harder & thinner with 90 degrees sharpened spine and standard tumbled finish.
We have already established that the harder & thinner ones have a slightly taller ground line where the line almost touches the Carothers mark. Also I have come to find out that there is no such an option as swedge with 90* spine which per Nathan are mutually exclusive, i.e, you can not order them with both options on the same FK2 from Nathan's shop.
As Nathan had clearly warned, the 90* spine is very sharp along the top of the knife which can actually cut you if you are not paying attention. I understand as to why he does not like to offer them like this which I had to see and feel for myself to satisfy my own curiosity (
I totally concur with Nathan).
Thank you Nathan as always and thank you very much
@Jo the Machinist for helping me out with the requested hardware