1: Introduction to the 1964 Washington Quarter Proof coin, a valuable collector's item.

2: History of the 1964 Washington Quarter Proof coin, minted during a transitional period in U.S. coinage.

3: Features of the 1964 Washington Quarter Proof coin, including the iconic design by John Flanagan.

4: Rarity of the 1964 Washington Quarter Proof coin, with only a limited number in circulation.

5: Value of the 1964 Washington Quarter Proof coin, sought after by collectors for its historical significance.

6: How to authenticate a 1964 Washington Quarter Proof coin to ensure its value.

7: Tips for storing and preserving a 1964 Washington Quarter Proof coin in mint condition.

8: Investment potential of the 1964 Washington Quarter Proof coin in the numismatic market.

9: Conclusion highlighting the enduring appeal of the 1964 Washington Quarter Proof coin for collectors.