SUISSE - SWITZERLAND Swiss Confederation (1848 to the present). Essay of 20 francs HELVETIA by L. Wiener 1873, head of angel, Brussels. Av. Helvetia seated left, leaning on the shield of the Confederation and holding a sword; above twenty-two stars; signature L. WIENER; in exergue HELVETIA. Rv. Wreath formed of an olive branch and an oak branch with 20 Fr./ (date) between two dots; in the field, above, angel's head. Fr.493 - HMZ.1228a - KM.Pn24 - OC.5; Gold - 6.45 g - 21 mm - 6 h NGC AT 58 (6647363-012). Test mark on the scroll at 11 o'clock on the reverse. Small handling marks in the fields, barely cleaned. Superb condition.