Badge was manufactured by Samurai Shokai workshop https://asiamedals.info/threads/history-labels-and-marks-of-samurai-shokai-trading-co-samurai.21242/
Suspension marked Samurai Shokai, Yokohama.
Obverse
御大典 - Enthronement
記念 - Commemorative
reverse
昭和三年十一月十日 - November 10, 1928
in the center emlem of the Equestrian Club "N.R.C."
Original case.
進呈 - Presentation (e.g. of a gift)
御大典奉祝記念 - Enthronement Celebration Commemorative
N.R.C.
See also https://asiamedals.info/threads/yok...nement-celebration-commemorative-badge.24203/