晝夜兩用明暗二重奏

Universal badge. Size 38.8 x 14.9 mm. 防空 - Air Defense Only original case allows you to get accurate attribution for these badges. 晝夜兩用 - For Day and Night 明暗二重奏 - Light and Dark Duo Stamped with 普及 - Universal 防空夜光徽章 - Air Defense Luminous Badge 實用新案願中 - New Patent Pending...