Per this discussion, extension of the copyright of works from the Dutch East Indies by the URAA would have considered Indonesian copyright law and not Dutch law. As such, this work is public domain in all relevant territories.
Public domainPublic domainfalsefalse
This work is in the public domain in the United States because it meets three requirements:
it was first published outside the United States (and not published in the U.S. within 30 days),
it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
it was in the public domain in its home country on the URAA date (January 1, 1996 for most countries).
shall be valid for 50 (fifty) years as of the first publication.
The Copyright on topographical arrangement of a published work shall be valid for 50 (fifty) years after as of the first publication of the Work.
The Copyright of works as referred to in paragraphs (1) and (2) of this article, and Article 29 paragraph (1) which are owned or held by a legal body, shall be valid for 50 (fifty) years as of from the first publication.
Article 31
The Copyright on works which are held or exercised by the State, pursuant to:
Article 10 paragraph (2), shall be valid without any time limit;
Article 11 paragraph (1) and paragraph (3) shall be valid for 50 (fifty) years as of the first time the work is known to the public.
The Copyright on works which are exercised by publishers pursuant to Article 11 paragraph (2) shall be valid for 50 (fifty) years as of the first publication.
