See also badges of the same design https://asiamedals.info/threads/greater-japan-civil-defense-association-saitama-branch-special-merit-badge.26929/ ; https://asiamedals.info/threads/saitama-prefecture-keibodan-badge.24748/
Bakelite.
Width 32 mm.
Obverse
埼 for 埼玉県 - Saitama Prefecture...
Late-war badge made in bakelite. See early metal-made badge of Shinobi police station https://asiamedals.info/threads/greater-japan-civil-defense-association-saitama-branch-special-merit-badge.24959/ and https://asiamedals.info/threads/saitama-prefecture-keibodan-badge.24748/. Another late-war...
Obverse
功績 - Meritorious Service
in the center of Keibodan emblem
協 /Kyō/ - to cooperate; to work together; to collaborate from 協會 /Kyōkai/ - Association
reverse
財團法人 - Foundation
大日本警防協會 - Dai Nippon [Greater Japan] Keibō Kyōkai [Civil Defense Association]
Original case.
功績章 -...