Obverse
401 for I-401 (伊号第四百一潜水艦/ I-gō-dai yon-hyaku-ichi-sensuikan) an Imperial Japanese Navy Sentoku-type submarine commissioned in 1945 for service in World War II.
reverse
第4回 - 4th
伊勢総会 - Ise [City] General Assembly/Meeting
48 = 1973
33 - March 3