100 Gulden

The Nederlandsche Bank printed this series domestically — unusual for a large-denomination note at a time when Dutch institutions frequently contracted German and English printers. The outbreak of war in August 1914 disrupted those relationships and forced the Bank to rely on its own facilities, which partly explains the relatively plain production quality compared to contemporaneous European issues.

The watermark is the note's principal security feature, which by 1914 standards was already considered minimal for a 100-unit denomination. No serial letter prefix distinguishes P#31A from later sub-variants in some collections, so provenance documentation matters here.