Port Arthur Fall Commemorative Watch Fob/明治三八年一月一日旅順陥落記念章

Photo courtesy of the owner.

Height 33.8 mm.
Width 19.2 mm.
Weight (including links) 8.1 g.

Reverse engraved

明治三八年一月一日 - January 1, 1905

旅順陥落記念 - Port Arthur Fall Commemorative

Railway sapper troops emblem.

 

Another example.