Collectible coins, particularly U.S. quarters, can hold significant value for numismatists. The Washington Quarter, first minted in 1932, features a profile of George Washington on the obverse and an eagle on the reverse for most of its history. The 1970 San Francisco Mint issue, designated as the S mintmark, has both proof and uncirculated versions, which are sought after by collectors. Factors like rarity, condition, and demand influence the collectible value of these quarters.

Item Denomination Series Year Mint
1970-S (San Francisco) Washington Quarters 25¢ (Twenty Five Cents, Quarter) Washington Quarters 1970 San Francisco