Hello Jose,
	Quote:
	
	
		| I might also add that they are also earlier, perhaps pre-1890s.  Most of those I have seen seem to be from 1700s to the mid 1870s. | 
	
 Could you please elaborate: Do you refer to Moro twistcore in general?
While many twistcore blades are really old (19th c. or even archaic), I've seen "plenty" that seemed to suggest a 20th c. origin to me.
Regards,
Kai