Obverse
功勞 - Merit
reverse
大日本防空協會 - Dainippon Air Defense Association
山梨縣支部 - Yamanashi Prefecture Branch
鰍澤部會 - Kajikazawa Town Branch of Association
Interesting that 部 is actually stamped over different kanji.
Case with label of Naigai Medal Co.
dainippon air defense association
dainippon air defense association badge
dainippon air defense association yamanashi branch
greater japan air defense association badge
merit badge
功勞章
大日本防空協会山梨縣支部章
大日本防空協会山梨縣支部鰍澤部会功勞章
大日本防空協会章