Watch List notes:

Koninkrijk NL Willem III (1849-1890) - Dubbele Gouden Willem 1850, was erroneously called 20 Gulden or Dubbele Negotiepenning (Sch. 542/RRR) - Obv: Bust of Willem III to the left, inscription: WILLEM III KONING DER NED. G.H.V.L. / Rev. Crowned Dutch coat of arms between oak branches, underneath mint and mint master's mark, inscription: 13w458 * 1850 * 0.900 - Gold, only a few pieces struck - in slab NGC PF60, edge damage on reverse