See also https://asiamedals.info/threads/1924-crown-prince-hirohito-royal-wedding-commemorative-watch-fobs-1924.27346/
Gold version.
Size 25 mm.
Weight 11.6/11.9 g.
Made by the Japanese Mint.
Obverse signed SH.
東宮殿下御成婚記念 - His Imperial Highness Crown Prince Wedding Commemorative
Reverse...
