How to Identify the 1866 Seated Liberty Quarter (Motto)

What the Coin Is

The 1866 quarter introduced the motto "IN GOD WE TRUST" to the reverse design, a change applied across several silver denominations that year following the Civil War. The Philadelphia-struck 1866 quarter had a notably low mintage, making it one of the key dates within the Seated Liberty quarter series and a coin many collectors specifically pursue when assembling a full type set.

Obverse Design & Inscriptions

Liberty sits on a rock holding a liberty pole with cap and a shield inscribed "LIBERTY," with the drapery fold at her elbow. Stars surround the figure with the date "1866" below; the obverse design itself is unchanged from other Seated Liberty quarters of the period, so the reverse motto is the key dating clue.

Reverse Design & Inscriptions

The reverse shows the familiar eagle with shield, olive branch, and arrows, now with a small ribbon above its head reading "IN GOD WE TRUST" — the defining feature that separates this design phase from earlier Seated Liberty quarters. "UNITED STATES OF AMERICA" and "QUARTER DOL." continue to surround the design as they did before the motto was introduced.

Size, Weight, Metal, Edge

The coin is struck in 90% silver and 10% copper, weighs 6.22 grams, measures 24.3 mm in diameter, and has a reeded edge, matching the weight standard used since the 1853 reduction.

Mint Marks

The Philadelphia issue carries no mintmark; a San Francisco-struck 1866-S exists as well, identifiable by an "S" mintmark below the eagle on the reverse, and it represents an entirely separate, similarly scarce issue from the same year.

Telling It Apart From Similar Coins

The presence of "IN GOD WE TRUST" above the eagle immediately separates this coin from pre-1866 Seated Liberty quarters, which lack any motto on the reverse. Within motto-era quarters, the date and mintmark together identify the specific issue and its relative scarcity, so both details should always be checked together.

Judging Condition at a Glance

Check Liberty's knee, breast, and head, and the eagle's wing feathers and shield lines, the typical high points for wear on this design. Because the motto ribbon sits in a lower-relief area, its legibility is not always a reliable wear indicator by itself — rely on the main design's high points instead when estimating overall grade.

Authenticity Red Flags

Given the desirability of this low-mintage date, inspect the date and any mintmark for signs of alteration from a more common year or mint, such as uneven spacing or tool marks. Also confirm the motto ribbon shows natural, struck lettering consistent with genuine coinage rather than an added or re-engraved inscription, since the motto itself can be a target for tampering on lower-value coins.