Established on July 9, 1920.
Badge was worn on the left chest as an ID badge of surveyor.
Surveyors were allowed to keep the badge after the end of the survey.
German silver.
Diameter 25.5 mm.
Weight 7.8 g.
Obverse
大日本帝國 - Empire of Japan
第一回國勢調查 - 1st National Survey
reverse
大正九年十月一日 -...