Look for the "S" mint mark indicating a rare silver-clad version.

Check for high-grade, uncirculated quarters with no wear.

Inspect for minting errors like double-dies or off-center strikes.

Identify rare proof versions with sharper details and finishes.

Verify whether the reverse design is Type I or Type II.

Examine the coin's edge for a solid silver band, not copper.

Use a magnifying glass to spot subtle design variations.

Get professional grading for an accurate assessment of value.

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