2019-S $1 American Innovation DE Cannon-Classifying the Stars, DCAM PR70DCAM 认证号38675340, PCGS号803438

2019-S American Innovation Dollar (Classifying the Stars - DE) PR70DCAM { PCGS-4 }. The American Innovation $1 Coin representing Delaware honors internationally recognized astronomer Annie Jump Cannon, who invented a system for classifying the stars still used today. Despite a hearing impairment, she advanced her education, gained recognition as a pioneer in science, and became the first woman to receive an honorary doctorate from Oxford University. This release offers an interesting minimal use of highly polished portions on the obverse almost draws one to conclude this must be a reverse proof; but it is not.