firemanengn4

Hi guys, directed here for some help. I obtained 13 swords from a deceased USMC vet, a whole box sent home! Well, some have marked tangs and some do not so I tried a little bit of self help with Yumoto's book but still having a difficult time of it. This tang has file marks V-shaped and it is shaped Uneven U shaped. Any help on date, maker and value? thanks.