Kaigun Yūshū-kai was established in October 1913. Association brought together former active duty naval officers and inform them "about current Naval advances/海軍進歩ノ現状ヲ知ル". Association published a magazine called "Yushu/有終".
Membership badge.
1st variation.
Size 20 mm.
Obverse
有終 / Yūshū / - Perfection; [Carrying Out to the] Perfection Completion