Prince Chichibu Marriage Tenranjiai Tournament Award Watch Fob/秩父宮殿下秩父宮妃殿下台覧競技大會賞章

See also table medals with the same design https://asiamedals.info/threads/prince-chichibu-marriage-commemorative-award-medals.24524/

Reverse

秩父宮殿下秩父宮妃殿下 - Prince Chichibu Her Imperial Highness Princess Chichibu

台覧競技大會賞 - Tenranjiai (game held with the Emperor in attendance) Tournament Award

昭和四年十一月 - November 1929


Note that month "十一" is stamped.

Original case.

造幣局製 - Made by Mint