Award Badge from Japan Maritime Self-Defense Force Officer Training School/海上自衛隊幹部候補生学校賞章

Obverse

賞 - Award

reverse

海上自衛隊　Maritime Self-Defense Force

幹部候補生学校 - Executive Candidate School/Officer Training School https://ja.wikipedia.org/wiki/幹部候補生学校


According to the case

badge was manufactured by

呉キシヨウ堂 - Kishou-dō from Hiroshima city.

but is it original?

 

Another known variant of case.

Different stamp.