Thanks Ron. I was writing quickly. The name has been corrected.
On basing our dating sole upon Cato's ideas i wholly agree. Simply because there is only one fairly comprehensive book on the subject doesn't mean that everything in it is correct. I would also put forth that simply because a blade has a separate gangya is not enough to automatically date it before 1930 either. I'm willing to bet that more than a few higher end blades produced even post-war could have separate gangya.
