Size 21 mm.
満蒙學術調査研究團 - Manchuria Academic Research Group
Marked 純銀 - pure silver and Tamaya workshop mark 玉 https://asiamedals.info/threads/badges-watch-fobs-and-medals-manufactured-by-tamaya.26703/
first scientific expedition to manchukuo
first scientific expedition to manchukuo badge
japanese puppet state badge
manchukuo badge
manchukuo badge with camel
manchuria academic research group badge
tamaya workshop
團満蒙学術調査研究団章
東京玉屋銀座
満蒙學術調査研究團
満蒙學術調査研究章