Late-war badge made in cupronickel with cold enamel /paint/. Early badge of different quality https://asiamedals.info/threads/1st-central-technical-skill-tournament-of-greater-japan-industrial-patriotic-service-association-presidents-award-badge.30749/.
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第四回 - 4th
技能競錬中央大會 -...
4th central technicalskilltournamentbadge
greater japan industrial patriotic association
technicalskilltournamentofjapanbadge
大日本産業報国会バッジ
大日本産業報國第四回技能競錬中央大會参加章