Finally I’ve got all of them. New SK2 arrived. Seems to be in very good condition. But before I can make nice photos, present them and then try in practice, it deserves some refreshing. I promise to do so and then comment. I hope that there will be no change in the overall conclusions comparing to what was reported in the other post on SK1. In fact, SK2 is close to SK1. A bit larger with more moderated curve. But the type is almost the same. It may be that this is a good compromise and balance between SK1 and SK3 which are on extreme sites.
This gives the possibility to compare all tree Saitos. See the below picture. There are photos of all 3 Saitos, in the same scale, put into the axis of the pivot whole. I hope to publish here the exact dimensions, including curvatures.
I decided to take some measurements of the geometries. In fact I have seen some custom-made razors, polish and japanese, which follow the original SKs but the difference is always appealing. So, what makes the difference?
Below, you can see SK1 and SK2 measurements. They might be not exact, as they have been taken from already used guys. Let’s also remember that SKs were made by different makers. I would point out that SK2 is more than 1 cm longer in blade itself. While the radius of the curve of the edge is more than 1.3 cm higher. This is a significant difference. But I believe that what is the most decisive is the dislocation of radius for internal and external (top and bottom) curves. In both SKs they are neither horizontally nor vertically aligned. It makes tremendous difference on the geometry of the hollow. Both are extra hollow with belly so the hollow belly line must be again dislocated (not symmetric) from upper and bottom edge. This must be hard for making!