Ken, Uwe,
Thanks for the notes. While I'm relatively new to the sword community, this wouldnt be my first sword as I have picked up two swords recently. One is a very fine condition (but unpapered) wakizashi signed bishu osfune samitsu and dated February 1410. Very nice sword whose hamon has strong notare ha and lots of nice activity as well as healthy boshi. The other is an unsigned koto tachi, likely from circa 1300-1320. It has seen many polishes and has some grain openings but it retains its classic tachi shape, is in nice polish and still has full boshi and a fairly well defined hamon.
I've been looking for an investment grade old tachi from either the Kamakura or nanbokucho period and the sword above comes close to fitting the bill with what I've been looking for in terms of quality, shape/characteristics and nbthk papers (tokubetsu Hozon / tokubetsu kicho grade). Still, this would be a meaningfully higher purchase price vs what I have historically spent thus far and there were enough questions in my mind about this particular sword that I wanted to reach out to this community (which is very well regarded) for some opinions.
Hope that clarifies things and again appreciate all the views/opinions.
Eric