Need Help in Identification

Hi all. My friend showed me a sword he bought from an estate sale some years ago in Vermont. He showed it to me the other day and I snapped these photos. I know a bit about Katana smithing, all I could ascertain was that the hamon is real, beyond that, I need some help.

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Sukesada

Hi,
The signature is "Bizen Kuni ju Osafune Sukesada".

Pete