Watch fobs were commissioned by Osaka Mainichi Shimbun and were manufactured by the Japanese Mint.
Mint also manufactured table medals with the same design https://asiamedals.info/threads/japanese-mint-ww1-commemorative-table-medals.26291/
Today thee variants of the watch fobs are known: gold...
1919年世界戦役講和條約調印記念章
japanese mint ww1 commemorative watch fob
japanese watch fob
japanese ww1 commemorative watch fob
japanese ww1 victory commemorative watch fob
watch fob made by japanese mint
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大正八年六月二十八日世界戦役講和條約調印記念章
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