Silver Three-Cent Piece (Trime)

The silver three-cent piece, nicknamed the "trime," was struck to make it easier for the public to buy the newly reduced three-cent postage stamp without using a fistful of large copper cents. At barely 14 millimeters wide, it remains the smallest coin by diameter the United States has ever issued.

Collectors group trimes into three types based on subtle design changes: Type 1 (1851–1853) has a plain six-pointed star and lower silver purity, Type 2 (1854–1858) adds triple outlines around the star and raises silver fineness to .900, and Type 3 (1859–1873) simplifies the star to double outlines. The series is popular as a short, affordable set for type collectors.

Congress authorized the three-cent silver piece in 1851, the same year the domestic letter postage rate dropped to three cents, partly to absorb Spanish silver coinage that was disappearing from circulation and partly to give the public a convenient coin for stamp purchases. It was the first U.S. coin struck with a debased silver alloy (Type 1) and the first American coin smaller than a dime.

Mint engraver James B. Longacre designed all three types. The denomination's popularity faded once nickel three-cent pieces and postage currency appeared during the Civil War, and mintages dropped sharply after 1863, with the final circulating-quality issues struck only in tiny numbers before the series ended in 1873.

The obverse of every trime shows a shield superimposed on a six-pointed star, with UNITED STATES OF AMERICA around the border and the date at the bottom. The reverse displays a large Roman numeral III inside an ornate letter C, surrounded by either thirteen stars (Type 1) or an olive branch above and a bundle of arrows below (Types 2 and 3).

To tell the types apart, look at the star on the obverse: Type 1 (1851–1853) has a single incuse outline, Type 2 (1854–1858) has three outlines forming a raised triple border, and Type 3 (1859–1873) returns to a double outline. Type 2 coins are also noticeably thinner and struck in higher-fineness silver, which sometimes causes them to have weaker, mushy details.

At under a gram in weight and about the size of a modern nickel's thickness but far smaller in diameter, trimes are easy to lose and easy to misidentify at a glance; a loupe helps confirm the star outline count and date.

Common-date trimes in worn condition are affordable and make an accessible entry point into 19th-century silver type collecting, while Mint State and proof examples command significant premiums because the tiny, thin planchets marked and bent easily. Type 2 coins (1854–1858) are scarcer and pricier than Type 1 or Type 3 in equivalent grade.

Key dates include several low-mintage Civil War-era issues from the early 1860s and true rarities such as 1873 (closed-3, proof-only) pieces. Because the design details are shallow, sharply struck, well-centered examples are disproportionately valuable, and values for common dates in circulated grades are generally modest while choice uncirculated or proof coins can reach into the hundreds or thousands of dollars.