How to Identify the 1921 Standing Liberty Quarter

What This Coin Is

The 1921 quarter is a key date in the Standing Liberty series, struck only at the Philadelphia Mint (no mint mark) in a comparatively small quantity that year, well below most other Philadelphia issues in the series.

Obverse Design

The design keeps MacNeil's standing Liberty figure holding an olive branch and shield within the gateway, "LIBERTY" arched at top and "IN GOD WE TRUST" to the right, but on this "Type 2" version a chainmail vest covers Liberty's previously bare right breast, a modification made partway through 1917.

Reverse Design

The same flying eagle fills the center, but on the Type 2 reverse three stars were added directly beneath the eagle, and the remaining stars were rearranged around the border, giving the lower field a noticeably different look from the Type 1 reverse.

Size, Weight, Metal, and Edge

Standing Liberty quarters are struck in 90% silver, 10% copper, weigh 6.25 grams, measure 24.3 mm across, and have a reeded edge, matching the specifications of the Barber and early Washington quarters that bracket the series.

Mint Mark Location

Unusually for a coin of this era, the mint mark sits on the obverse rather than the reverse: look just to the left of the date, near Liberty's leading foot. No mark means Philadelphia; a "D" indicates Denver and an "S" indicates San Francisco. A genuine 1921 quarter from Philadelphia should show no mint mark at all in this location; any letter present would indicate a different date or an altered coin.

Telling It Apart from Similar Coins

Since 1921 was a lower-mintage year, some sellers or previous owners may confuse it with more common nearby dates like 1920 or 1923 if the date is worn. Careful comparison of the last digit against reference images helps confirm the date, especially since Type 1's unprotected date wears quickly, though by 1921 the Type 2 design with its slightly sturdier date area was standard.

Judging Condition at a Glance

Wear appears first on Liberty's head and the rounded shield rim on the obverse, and on the eagle's breast and the leading wing edge on the reverse. On Type 1 coins, the date sits unprotected at the rim, so it wears down or disappears entirely on well-circulated pieces; the head, shield, and date's legibility together give a quick read on grade. Because this date is scarce in all grades, coins with clear head, shield, and leg-drapery details command particular attention, while heavily worn examples still hold interest purely due to the date's rarity.

Authenticity Red Flags

Because several dates in this series carry low mintages, watch for added or re-engraved mint marks on the obverse, and for full dates that look freshly re-cut on coins that should otherwise show wear consistent with the rest of the design. A mint mark or date that appears sharper or more raised than the surrounding worn surface is a sign to look closer. Given the premium on this date, also watch for a re-cut final digit that might turn a common date like 1928 or 1923 into an apparent "1921" on close inspection.