50 Rupiah

The 1957 series was among the first fully centralized post-independence issues from Bank Indonesia, replacing the fragmented colonial-era currency structure that had persisted well past the 1945 proclamation. Thomas De La Rue handled production in London — not unusual for newly independent nations in this period that lacked domestic printing infrastructure and needed internationally credible notes quickly.

Pick 50 is notoriously prone to foxing and humidity damage, a chronic problem with Indonesian notes of this era given storage conditions in the archipelago's climate. Survivors in genuinely clean condition are less common than catalog frequency suggests.