Watch List notes:

NETHERLANDS. Willem III, 1849-1890. 5 Gulden 1850, Utrecht. Proof strike. Obv. WILLEM III KONING - DER NED G H V L. Head left. Rev. 3 W 3645 - 1850 - 0,900. Coat of arms within an oak wreath. KM 94; Fr. 341. AU. 3.36 g. NGC PF 64 CAM
Ex. Heritage auction 3061, 7-8 jan 2018, lot 32439.