1904-5 Navy Meritorious Service Association Campaign Commemorative Watch Fob/明治三七八年海軍勳功表彰會戰役記念章

Photo courtesy of the owner.

Height 19 mm.
Width 18.7 mm.
Weight 2.9 g.

Reverse

明治三七八年 - 1904-5

海軍勳功表彰會 - Navy Meritorious Service Association

戰役記念 - Campaign Commemorative

 

Another example.