How to Identify the Alabama Centennial Half Dollar
A 1921 silver commemorative honoring Alabama's statehood centennial, notable for portraying two named historical figures and for a scarcer '2X2' die variety.
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What This Coin Is
The Alabama Centennial Half Dollar was struck in 1921 to mark the 100th anniversary of Alabama's admission to the Union in 1819, with the coin itself dated to the 1921 centennial event rather than the statehood year. Designed by Laura Gardin Fraser, it holds the distinction of being the first U.S. commemorative coin to depict an identifiable historical figure other than a president, and one of the first to name two individuals on the same coin.
Obverse Design
The obverse displays jugate (side-by-side) busts of William Wyatt Bibb, Alabama's first governor, and Thomas E. Kilby, governor at the time of the centennial. "UNITED STATES OF AMERICA" arcs above, and "HALF DOLLAR" appears below the portraits.
Reverse Design
The reverse features an eagle with wings spread, adapted from the Alabama state seal, perched above a shield-like design. "ALABAMA CENTENNIAL 1819-1921" and "STARS AND STRIPES" style lettering surround the eagle, along with "IN GOD WE TRUST" and "E PLURIBUS UNUM."
Size, Weight, Metal, and Edge
The coin is struck in 90% silver, 10% copper, weighs about 12.5 grams, measures roughly 30.6mm in diameter, and has a reeded edge, in line with other classic commemorative half dollars of the period.
Mint Marks and the "2X2" Variety
All Alabama Centennial halves were struck at the Philadelphia Mint and carry no mint mark. Instead, the key variety marker on this coin is a small "2X2" incused into the obverse field near the right (Kilby) portrait, representing Alabama's status as the 22nd state. Coins bearing this mark are scarcer than those without it and are identified as a distinct, more valuable variety. Use magnification to check the field beside the portraits for this small stamped mark.
Telling It Apart from Similar Coins
The double-portrait obverse is unique to this issue among classic commemoratives, so confusion with other coins is unlikely. The identification challenge specific to the Alabama half is distinguishing the "2X2" variety from the plain version, since the two are otherwise struck from very similar dies.
Judging Condition at a Glance
Examine the cheeks and hairlines of both portraits on the obverse, along with the eagle's breast and wingtip feathers on the reverse. Crisp separation between the two overlapping busts indicates a lightly worn coin, while blending of their facial features signals more significant circulation wear.
Authenticity Red Flags
Given the premium attached to the "2X2" variety, inspect that mark closely for consistent depth and placement matching known genuine examples rather than an added scratch or stamp. General red flags for this issue include incorrect weight or diameter, mushy or indistinct portrait detail suggesting a cast copy, and an edge lacking clean, uniform reeding.
Frequently asked questions
Who are the two men shown on the Alabama Centennial half dollar?
William Wyatt Bibb, Alabama's first governor, and Thomas E. Kilby, the governor at the time of the 1921 centennial.
What does the '2X2' mark mean?
It is a small incused mark near the portraits signifying Alabama as the 22nd state; coins with this mark are a scarcer variety than those without it.
Does this coin have a mint mark?
No, it was struck only at the Philadelphia Mint and carries no mint mark.
Why is this coin historically significant?
It was one of the first U.S. commemorative coins to depict identifiable, named individuals other than a president.
What should I check for grading condition?
Look at the cheeks and hair of both portraits and the eagle's feather detail on the reverse for signs of wear.