1921-S Walking Liberty Half: West Coast's Affordable Key
Coin Encyclopedia · 8 min read · Published November 7, 2026
The 1921-S Walking Liberty half is the San Francisco member of the famous 1921 trio — the largest mintage of the three, and still a key date. San Francisco struck 548,000 of them in 1921, more than Philadelphia's 246,000 and Denver's 208,000, but the number is small by the standards of the series, and the coins were spent hard on the West Coast. Today the 1921-S is scarce in every grade and hard in Mint State, the third leg of the trio that defines the Walking Liberty series.
It is the most affordable of the three 1921 issues — the larger mintage and the softer strikes keep it below its two brothers — but it is still a key date, and it is still a coin to choose carefully. This guide explains the S check, the San Francisco character of the coin, and what to look for before you pay for one.
548,000 — the largest of the trio, and still a key date
The three 1921 mintages tell the story of a recession year: Philadelphia 246,000, Denver 208,000, San Francisco 548,000. The San Francisco figure is the largest of the three, but it is small by any other measure — the Mint struck tens of millions of Walking Liberty halves in the years around 1921, and the 1921-S is a fraction of any of them. A mintage of 548,000 is a key date in a series where common dates run to the millions.
The coins were struck for a West Coast economy in recession, and they circulated there for years — in shops, in pay envelopes, in tills — wearing down a little with every transaction. Few were set aside, because nobody in 1921 knew the date would matter, and the collectors who might have saved them were few. The survivors are mostly worn, and the Mint State examples are scarce.
The S check — below the eagle, on the reverse
On the 1921-S the mint mark is an S on the reverse, below the eagle — the position the Mint settled on in mid-1917. It is the only difference between the San Francisco key date and the Philadelphia 1921, which carries no mint mark, and it is the detail that carries the premium. A 1921 with no mint mark is the Philadelphia key date; a 1921-S is the San Francisco key date.
The check is worth doing with a loupe, because the 1921 issues are among the most faked dates in the series. An added S sits too high, too shallow, or at the wrong angle, and the metal around it shows tool marks; a genuine S is crisp, correctly placed, and part of the original strike. An altered date is the other trick — a common San Francisco half with a changed digit — and a loupe will show the tool marks around the altered date.
San Francisco strikes — soft detail, honest wear
San Francisco's Walking Liberty halves are often the most softly struck of the three mints, and the 1921-S is a textbook case: Liberty's head and gown, and the eagle's feathers, can look weak even on unworn examples. That softness is a mint characteristic, not wear — the dies were often tired, and the strikes were often light — so the surfaces and the lustre are the better guide to grade than the sharpness of the detail.
Wear shows first on Liberty's head, breast, and knee, and on the eagle's breast. A 1921-S with honest wear is a key-date coin in any grade; one with full lustre and a sharp strike is a rarity. And as with every key date, cleaning is the enemy: a cleaned 1921-S loses a large part of its premium, because the premium is paid for originality as much as for rarity.
The 1921-S in a set — the affordable leg of the trio
Of the three 1921 issues, the 1921-S is the one most collectors seek first — because it is the most affordable. The larger mintage and the softer strikes keep it below the Philadelphia and Denver coins, and a worn 1921-S is a fair purchase for a collector building the set. It is still a key date, and it still takes a deliberate purchase, but it is the leg of the trio within reach.
For a collector building the set, the order is usually the 1921-S first, then the 1921 Philadelphia, then the 1921-D last — the order of value, and the order of difficulty. Seek the 1921-S certified when the grade matters, seek it original always, and let it be the first of the trio rather than the last coin you never get.
What a 1921-S Walking Liberty Half San Francisco key is worth by grade
Our guide has not yet researched grade-by-grade estimates for this date, so every cell below shows “—” rather than a guessed figure. The live system fills these cells the moment research or a newly reported result lands. Figures on this page are reviewed November 5, 2026.
| Grade | Estimated value |
|---|---|
| Good (G-4) | — |
| Fine (F-12) | — |
| Extremely Fine (XF-40) | — |
| About Uncirculated (AU-50) | — |
| Mint State 60 (MS-60) | — |
| Mint State 65 (MS-65) | — |
No researched grade figures exist for the 1921-S yet. The mintage of 548,000 is the largest of the three 1921 issues, but it is still small by the standards of the series, and high-grade examples are scarce.
Specs and the silver floor
Every Walking Liberty half from 1916 through 1947 is 90% silver. The coin weighs 12.5 grams and carries 0.36169 troy ounces of pure silver. The live metal floor for this coin is $18.83 — it moves with the live silver market, so the figure updates on every load rather than standing still.
Metal floor updates live from our Worker — last updated November 7, 2026.
Adolph A. Weinman's Liberty strides toward the rising sun on the obverse, draped in the American flag, while the reverse carries a perched eagle on a mountain crag. Diameter 30.6 millimetres, reeded edge. In 1916 and early 1917 the mint mark sits on the obverse, below the motto; from mid-1917 it moved to the reverse, below the eagle.
Verified auction records
Our auction data holds no verified historic record for this date yet — no figure here is guessed. The box below checks for newly reported results on every load, so the first verified result for this coin will appear there.
Latest reported results for this coin
Checking for newly reported results…
Your 1921-S Walking Liberty Half San Francisco key questions, answered
How much is a 1921-S Walking Liberty half dollar worth?
Our guide has not yet researched grade-by-grade estimates for the 1921-S, so the table shows dashes. With a mintage of 548,000, it is the largest of the three 1921 issues but still a key date — scarce in every grade and hard in Mint State.
Is the 1921-S Walking Liberty half silver?
Yes — it is 90% silver, weighing 12.5 grams with 0.36169 troy ounces of pure silver. The live metal floor for this coin is in the specs section below and moves with the live silver market.
Where is the mint mark on a 1921-S Walking Liberty half?
The mint mark is an S on the reverse, below the eagle. The Philadelphia 1921 carries no mint mark, and the 1921-D carries a D in the same position.
How many 1921-S Walking Liberty halves were struck?
San Francisco struck 548,000 Walking Liberty halves in 1921 — more than Philadelphia's 246,000 and Denver's 208,000, but still a small mintage by the standards of the series.
Why is the 1921-S more affordable than the other 1921 halves?
It has the largest mintage of the trio, 548,000, and San Francisco's strikes were often softer, so fewer examples reach the top grades. It is still a key date — just the most reachable leg of the trio.
Check your 1921-S
Run the date and mint mark through the free Coin Value Checker for an instant estimate, or get a Grade-or-Not verdict on whether your coin is worth certifying. The full series guide is here: Walking Liberty Halves Worth $25 to $188,000+.
Written for collectors starting the 1921 trio — the 1921-S is the affordable leg, and the right place to begin. This guide is for education — learn the coin first, and get a professional opinion before buying or selling.
