Thank you Bruce,
an amazing document.
This Munetoshi, October, 1942 sword pushes the use of the matsu stamp to much earlier than the document states (1944) - new info is good info.
According to the document, this sword is a bit of a mystery. Munetoshi was supplied tamahagane and is known for making traditional swords as was his brother.
The document states that star stamp indicates non-traditional made sword. This sword has no star.
So, is it traditionally made tamahagane or mill steel?
is it water or oil quench?
There was another post that mentioned a Munetoshi dated aug/sept 1942 and stamped in the low 300s. This Munetoshi is 451 making it roughly 100 swords later and indicating production output of 100/month between the two brothers. A third Munetoshi (might have been his brother) dated May 1943 was numbered a little over 1000, again suggesting production of around 100/month between the two brothers.
The question is, what is the production rate of traditional verses non-traditional swords?
Finally, is this a quality sword or a wall hanging?
Many thanks, in advance, to all those who might offer their expertise.
Regards
david