Greater Japan Aviation Women's Association badge of similar design https://asiamedals.info/threads/greater-japan-aviation-womens-association-local-regular-members-badge.26897/
Size 26×18 mm.
Weight 4.27 g.
Reverse
有功會員章 - Meritorious Member's Badge
海と空の會 - Sea and Sky Association
japanese aviation associationbadge
japanese aviation badge
japanese seaandskyassociationbadgeseaandskyassociationmeritorious member's badge
有功会員章
海と空の会有功会員章
海と空の会章