English: This was the flag used by various sultanates in East Borneo, such as Sambaliung, Bulungan, and Gunung Tabur during the 19th century. As the three sultanates were previously under Berau's rule, it could be assumed that Berau used the same flag.
日期
来源
J. Hageman. "Aantekeningen omtrent een gedeelte der Oostkust van Borneo" in Tijdschrift voor Indische Taal- Land- en Volkenkunde, Vol. 4, 1855, pp. 71-106.
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