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1999-S Close AM Proof

Small Cents · Lincoln Memorial Cents · 1959–2008
Key date Proof
Weight2.5 g
Diameter19.05 mm
MintSan Francisco
StrikeProof
Mintage 3,347,966 Combined mintage for all 1999-S proof varieties
EdgePlain
Alignment↑↓ Coin
CompositionCopper-plated Zinc (97.5% Zinc, 2.5% Copper)
DesignerVictor D. Brenner / Frank Gasparro
Collector's Key IDCK-758

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About this coinHistory

The 1999-S Close AM Proof is another example of the die-mixing varieties that affected Lincoln cent production in the late 1990s. Like the 1998-S Close AM Proof, this coin was produced when reverse dies intended for one purpose (proof or circulation) were accidentally used in the other context.

The "A" and "M" in "AMERICA" on the reverse provide the key diagnostic. Proof coins from this era were normally struck with the Close AM reverse, but die confusion between proof and circulation reverse hubs created mixed-type coins. The 1999-S Close AM variety follows the database classification and is scarce. It carries a meaningful premium over the standard 1999-S Proof. Authentication by a major grading service is important, as the spacing difference requires careful comparison. Collectors of AM varieties consider 1998-S and 1999-S the key dates.

Price guideReference

Reference data only — not an appraisal.

GradeDescriptionLowHigh
PR-63 Proof (PR)
Frequently Asked QuestionsFAQ
How many 1999-S Close AM Proof Lincoln Memorial Cents were minted?
3,347,966 were struck (Combined mintage for all 1999-S proof varieties).
What is a 1999-S Close AM Proof Lincoln Memorial Cent made of?
Copper-plated Zinc (97.5% Zinc, 2.5% Copper), weighing 2.5 g.
What is the melt value of a 1999-S Close AM Proof Lincoln Memorial Cent?
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 1999-S Close AM Proof Lincoln Memorial Cent a key date?
Yes — the 1999-S Close AM Proof Lincoln Memorial Cent is considered a key date in the Lincoln Memorial Cents series and commands a strong premium.