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1879-S DOUBLE EAGLE
OR $20 GOLD

PCGS No: 8991

Mintage:

Circulation strikes: 1,223,800
Proofs: 0

Designer: James Barton Longacre

Diameter: 34 millimeters

Metal content:
Gold - 90%
Other - 10% 

Weight: 516 grains (33.4 grams)

Edge: Reeded

Mintmark: "S" (for San Francisco, CA) below the eagle's tail on the reverse

Images courtesy of 

Significant examples:

Recent appearances:
PCGS AU-58.  Ex - Heritage Numismatic Auctions, Inc.'s "Philadelphia 2000 Signature Sale", August 6-7, 2000, Lot 7469, not illustrated, not sold

PCGS AU-58.  Ex- Heritage Numismatic Auctions, Inc.'s "October 2000 Long Beach Sale" October 5-7, 2000, Lot 7871, not illustrated, sold for $379.50

ANACS AU-58.  Ex - Heritage Numismatic Auctions, Inc.'s, "Summer 2001 Long Beach Signature Sale", May 31-June 2, 2001, Lot 9234, not plated, sold for $661.25

NGC AU-50.  Ex - Heritage Numismatic Auctions, Inc.'s "Philadelphia 2000 Signature Sale", August 6-7, 2000, Lot 7468, not illustrated, sold for $345.00

Extremely Fine.  Ex- Stack's "The September Sale", September 12-13, 2000, Lot 1764 @$322.00

Extremely Fine.  Ex- Stack's "The September Sale", September 12-13, 2000, Lot 1765 @$322.00

NGC AU-58, Choice About Uncirculated and just a whisper away from a full Mint State designation.  Ex - Stack's "65th Anniversary Sale", October 17-19, 2000, Lot 1886, not plated, sold for $488.75

Notes:
The finest example graded by PCGS is a single MS-63.

Varieties:

Sources and/or recommended reading:
"The PCGS Population Report, July 2003" by The Professional Coin Grading Service