Watch List notes:

Belgium - Leopold I (1831-1865) - 20 Centimes 1860 - MULE Essai by Wiener in nickel (Dupr.772 obv. and Dupr.792 rev.) - Obv: Bare head left, L. Wiener below, alle within guirlande / Rev: Value and date in the middle of nine-pointed star, letters of BELGIQUE in rays (1 empty) - smooth edge 6.75 g. - UNC, extremely rare coin, undescribed by Dupriez and Bogaert