1936 Three Cities Union Air Defense Maneuvers Participation Badge/昭和十一年度三市連合防空演習東京市滝野川區防護團参加章

Badge of similar design https://asiamedals.info/threads/narihira-branch-5th-air-defense-maneuvers-participation-badge.24825/

Obverse

防空 - Air Defense

reverse

昭和十一年度三市連合防空演習 - 1936 Three Cities Union Air Defense Maneuvers

参加章 - Participation Badge

東京市滝野川區防護團 - Tokyo City Takinogawa District Air Defense Corp

田端分團 - Tabata Branch