The 1927 China Republic Sun Yat Sen "Memento Dollar" silver coin is a valuable collectable item for those interested in ancient Chinese coins. This particular coin has not been cleaned and has a silver fineness of 0.890. It is from China and is uncertified, making it a rare and unique piece for collectors. With its historical significance and intriguing design, this coin would make a prized addition to any collection of Chinese numismatic items.