Watch List notes:

BRITISH COMMEMORATIVE MEDALS. Netherlands, William III (1650-1702), later King of England (1689), Silver Medal, 1657, by Gurian Pool, child bust right wearing plumed hat, rev legend in eight lines below cord, 48mm (vL II, 423/409). Choice extremely fine, rare.
Following the Peace of Westminster, the Act of Seclusion forbade the Dutch to appoint any member of the House of Orange a Stadtholder.William was finally appointed in the "Disaster Year" of 1672.

Estimate: £1500-1800