During the Japanese military occupation of Java (1942–1945), the Java Military Administration (Osamu Butai) took control of the colonial mineral and research infrastructure, renaming the Dutch Geological Survey (Dienst van de Mijnbouw) in Bandung to the Bandung Chishitsu Chosasho (often transliterated as Bandung Tititsutiyo Zaiyi or Chisitsu Chosasho).
Specimen from the collection of Raymond LaBar. Photos courtesy of the owner.
Obverse
In Indonesian:
Djawa Gunseikanbu - Java Military Administration (the supreme head of the Japanese occupation government on the island of Java)
Bandoeng — The City of Bandung
Tisitutyo Sazyo — A phonetic Latin transliteration of Japanese terms:
Tisitutyo (Japanese: 地質調査所 — Chishitsu Chōsajo) — Geological Survey
Sazyo (Japanese: 作業所 — Sagyōjo) — Workshops / Operational Workplace
In Japanese:
地質調査所 (Chishitsu Chōsajo) — Geological Survey
チシツチョウ (Chishitsuchō) — Phonetic guide to help pronounce the Japanese word for "Geological"
軍政監部 (Gunseikanbu) — Military Administration
Stamped with a number "311".