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1999 (S) Proof Pennsylvania Silver State Quarter

Strike Type
1999 (S) Quarter coin

Coin Details

Year
1999
Denomination
Quarter
Mint Mark
S
Strike Type
Proof
Series
State Quarters 1999-2008
Designer
John Flanagan/John Mercanti
Mintage
804,565
Composition
90% Silver, 10% Copper
Weight
6.25g
Diameter
24.3mm
Edge
Reeded

Value Estimates

$0.25 - $45

Values as of May 2026, from published price guides and, in some cases, recorded auction sales. For most coins the range runs from a well-worn example (around G-4) to an uncirculated one, but individual coins can sell for more or less depending on grade, eye appeal and demand. Compare recent sales of similar coins for a closer estimate.

Auction Record

Price realized
$1,725
Sold
Grade
PR70
Auction house
Heritage Auctions

Description

The 1999 (S) Proof Pennsylvania Silver State Quarter is a proof quarter struck at the San Francisco Mint, part of the State Quarters 1999-2008 series. The San Francisco Mint struck 804,565 silver proof Pennsylvania quarters dated 1999. The obverse features George Washington facing left, based on a 1786 bust by Jean-Antoine Houdon and the reverse displays unique designs representing each of the 50 U.S. states, released in the order the states ratified the Constitution or joined the Union. The program's first five quarters, issued in 1999, honored in release order Delaware, Pennsylvania, New Jersey, Georgia, and Connecticut. The program instantly became the most successful numismatic initiative in U.S. history. As a proof issue, this coin was struck multiple times on specially prepared polished planchets using polished dies, producing mirror-like fields and frosted design elements prized by collectors. Struck at the San Francisco Mint, established during the California Gold Rush and now primarily producing proof and collector coins. Estimated market value ranges from $0.25 to $45 depending on grade and condition. Struck in 90% silver, 10% copper, weighing 6.25 grams, 24.3 mm in diameter, with a reeded edge. Cataloged as PCGS #913000.

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