Help with gendaito mei

[O koumori]

I think the last 2 are 'Sadatoshi' (?) but can't get the preceding kanji...

Thanks!

Dan K.

[SteveM]

Yes, Seishinshi Sadatoshi (清心子貞寿)

 

Here is another for comparison. 

https://www.nipponto.co.jp/swords7/KT334726.htm

[Bencld]

Compared.

 

[O koumori]

Thank you!

Dan K