1971 American Heritage Treasures of American History Ringing of the Liberty Bell Franklin Mint Sterling

Obverse: 1776 / ( Colonel John Nixon ringing the Liberty Bell in the tower of Independence Hall)

Reverse: (American Heritage Eagle) / INDEPENDENCE / DECLARED BY / PATRIOTS / (3 stars)

Edge: Flat: STERLING / F 71 P / (Franklin Mint Hallmarks)

No capsules, we have placed these into plastic sleeves and then clear flips. 

The excessive reflective surface of the proof strike causes the black that appears in the fields. The tone is either old contact spots or a milky haze from time and poor handling and/or storage.  

Reference: 1981 Guidebook Franklin Mint issues, by Chester L. Krause

"Drawing on material published in American Heritage magazine, it's editors choose 20 events of historical significance for inclusion in this series. The proof edition was available only to members of the American Heritage Society and the Franklin Mint Collectors Society. The proof editions were not made available to other collectors"