1928-A年坐洋20分试作样币。铜镍合金铸造,深峻,轻微包浆,光泽亮丽,极美。PCGS SP-66 Secure Holder.FRENCH INDO-CHINA. 20 Cents Essai, 1928-A. PCGS SP-66 Secure Holder.KM-E14; Gad-27; Lec-227. Struck in copper-nickel. Needle sharp strike with just a light veneer of attractive tone. Highly lustrous and quite handsome.