4th class Achievement Badge.
Photos courtesy of the owner.
Width 21 mm.
Height 30.7 mm.
Weight 11.2 g.
Obverse
Butoku Kai emblem
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有績章 - Achievement Badge
reverse
大日本武徳會 - Dai Nippon Butoku Kai
長崎支部 - Nagasaki [Prefecture] Branch of Society
諫早支局 - Isahaya [City] Branch Office...