Width 140 mm.
Reverse of the base
帝國飛行協會 - Imperial Japan Aviation Association
Marked with Funahashi workshop mark https://asiamedals.info/threads/badges-and-watch-fobs-manufactured-by-funahashi-funabashi-medal-co-medaru.25352/.
Paperweight was designed to spin.
Reverse
特別有功會員章 - Special Meritorious Member's Badge
大日本飛行協會 - Greater Japan Aviation Association
Original case.
特別有功會員章 - Special Meritorious Member's Badge
大日本飛行協會 - Greater Japan Aviation Association
Made by Funahashi Medal Co., Tokyo, Shitaya...