This first kanji had stumped me .... but I think there is a crease in the steel I thought was a stroke; so none of the obvious kanji came to mind.
I'm thinking it is 盛光
Morimitsu
There are 20 Morimitsu smiths listed by Marcus Sesko, ranging from 1368 ~ 1945.
I've found a 1st Generation Morimitsu to compare the kanji. Your (*if* it is Morimitsu) kanji signature style does not match the 1st generation's style; it might be one of the other 19 Morimitsu ... or it could be a "gimei" [false signature]. I'm no expert!
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