See also https://asiamedals.info/threads/1959-marriage-of-crown-prince-akihito-and-michiko-shoda-commemorative-watch-fobs.26646/#post-364150
1st variation.
Size 55 mm.
Weight 84.6 g.
Obverse
皇太子殿下御結婚記念 - Wedding of His Royal Highness the Crown Prince Commemorative
Signed S.Hata for...
1959年皇太子殿下御婚儀警衛記念章
1959年皇太子殿下御婚儀警衛記念章牌
medal made by japanese mint
wedding of his royal highness the crown prince
wedding of prince akihito commemorative medal
昭和三十四年四月十日皇太子殿下御婚儀警衛記念章牌
皇太子殿下御婚儀警衛記念章
皇太子殿下御結婚儀警衛記念メダル
造幣局製 made by the mint
造幣局製メダル
造幣局製記念メダル