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1866 Proof

Half Dimes · Seated Liberty Half Dimes · 1837–1873
Key date Proof
Weight1.24 g
Diameter15.5 mm
MintPhiladelphia
StrikeProof
Mintage 725
EdgeReeded
Alignment↑↓ Coin
Composition90% Silver, 10% Copper
DesignerChristian Gobrecht
Collector's Key IDCK-1125

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About this coinHistory

The 1866 proof half dime is the first post-war proof of the Seated Liberty series. Production continued at modest levels as the Mint's collector program maintained its annual schedule through the Reconstruction era. The 1866 proof pairs with the key-date 1866 circulation strike (mintage 10,000 coins).

Price guideReference

Reference data only — not an appraisal.

GradeDescriptionLowHigh
PR-63 Proof (PR)
Frequently Asked QuestionsFAQ
How many 1866 Proof Seated Liberty Half Dimes were minted?
725 were struck.
What is a 1866 Proof Seated Liberty Half Dime made of?
90% Silver, 10% Copper, weighing 1.24 g.
What is the melt value of a 1866 Proof Seated Liberty Half Dime?
Its melt value is its metal content multiplied by the current spot price. See our melt calculator on the metals pages for a live figure.
Is the 1866 Proof Seated Liberty Half Dime a key date?
Yes — the 1866 Proof Seated Liberty Half Dime is considered a key date in the Seated Liberty Half Dimes series and commands a strong premium.