Osaka Regimental District Officer Corps Badge/大阪聨隊區将校團章

Tokyo Hongō Ward Officer Corps Badge https://asiamedals.info/threads/tokyo-hongo-ward-regimental-district-officer-corps-badge.24087/
Sakai Regimental District Officer Corps East Ward Branch Member's Badge https://asiamedals.info/threads/sak...r-corps-east-ward-branch-members-badge.28654/

Reverse

大阪連隊区将校團章 - Osaka Regimental District Officer Corps

Marks.

Silver + barely readable H.K.D. inside the diamond https://asiamedals.info/threads/badges-and-watch-fobs-made-by-h-k-d-workshop.22291

Case.