De Nederlandsche Bank, specimen 25 gulden, 10th April 1955, no. 288, serial number 9XZ012345, 9XZ067890, red, orange and brown, Christiaan Huygens at right, reverse, red, lilac and green,
(Pick 87s), 'SPECIMEN' written in red diagonally across front and reverse, uncirculated.
Estimate: £600 - £800