Netherlands - Zierikzee. Gold Ducat, 1575. Mailliet-Plate CXXXI, 7. 3.4 grams. Uniface. Siege coinage. Besieged by the Spaniards under Mondragon, 1575-1576. City arms, date below. Later striking. Struck on a ducat of 1801, head of knight holding sword and date visible on reverse. About Uncirculated. Estimated Value $3,000 - 3,500