In the form of the tsuba.
Size 70 x 60 mm.
Reverse
皇太子殿下御誕生 - Birth of His Imperial Highness the Crown Prince
奉祝會記念 - Celebration Society Commemorative
昭和九年五月 - May 1934
三十日 - 30
三十一日 - 31
財團法人 - Foundation
宮内省互助會 - Ministry of the Imperial Household Benefit Society
Similar symbols could be found on the commemorative table medal https://asiamedals.info/threads/crown-princes-birthday-commemorative-medal.24521/
Size 70 x 60 mm.
Reverse
皇太子殿下御誕生 - Birth of His Imperial Highness the Crown Prince
奉祝會記念 - Celebration Society Commemorative
昭和九年五月 - May 1934
三十日 - 30
三十一日 - 31
財團法人 - Foundation
宮内省互助會 - Ministry of the Imperial Household Benefit Society
Similar symbols could be found on the commemorative table medal https://asiamedals.info/threads/crown-princes-birthday-commemorative-medal.24521/