Is there any conclusive document or knowledge available about this period of Arsenal blades commonly seen in combat versions of Kyu Gunto and other swords of this period? The only information I have found is on Murata-To, but the scope of that process is unknown as they are usually associated with the Kogasa-Maru style blades or signed blades made by General Murata himself.
I ask because some of these blades are a step above what we normally see in arsenal blades made during WW2, the one I have could be mistaken for Nihonto until looked at closely. The sword is tempered with etched hamon and NOT a parade style blade. I have seen a few other examples with similar quality and pattern blades so I wonder if other members here have Kyu Gunto with these Arsenal blades and have any further information at hand. One detail I have noted is very similar Horimono on all of these blades.
Here's an almost identical blade but clearly handmade with real hamon: http://www.artswords...unts_042508.htm