1917年20分。两年版,含银量0.600。半身像下的点是个简单的识别标志,用以确定其所属版别,而不必翻转钱币查看年份。铸打锐利,光泽亮丽,通体烟燻色包浆。KM-30; Tan-SSC29. Two year type struck in 0.600 fine silver. Dot below bust which is an easy identifying mark to determine which type it is without even turning the coin over to check the date. Sharply struck and highly lustrous with lovely smokey tone throughout.PCGS MS-64 Secure Holder.