Watch List notes:

Koninkrejk der Nederlanden, Zilverbon, a group of proofs 1 gulden (3), 7 August 1914, first; black text on brown underprint, brown value 1 at centre, second; brown underprint, value 1 at centre, third; brown value 1 at centre, all perforated(Pick 4p), first extremely fine, the remaining uncirculated (3).

Estimate: £200 - £280