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The 1866 Proof Three Cent Silver comes from a moderately low mintage for its series of 725 coins; most of which were saved leaving the issue readily available to collectors and relatively affordable. Scarce only in gem condition. Cameo pieces are far more difficult to locate in all grades and deep cameos are a rarity. Look for attractive toners as this series is full of them.
Obverse Description
A six-pointed star with a harp in the center is surrounded by UNITED STATES OF AMERICA on the periphery and the date positioned at the bottom. For the type III issues (1859-73) there is a single frame line around the star.
Reverse Description
The roman numeral III is centered in the design ensconced in a large, bejeweled letter C surrounded by 13 stars on the periphery. An olive sprig is added above the roman numerals.
Catalog Information
GSID:
3686
Designer:
James B. Longacre
Obverse Designer:
James B. Longacre
Obverse Lettering:
UNITED STATES OF AMERICA, 1866
Reverse Designer:
James B. Longacre
Reverse Lettering:
III
Fineness:
0.9
Weight (gr):
0.75 gr
Weight (oz):
0.0241 oz
Precious Metal Weight:
0.0217 oz
Strike Type:
Proof
Diameter:
14
Coin Shape:
Round
Edge:
Plain
Coin Date:
1866
Denomination:
3cS
Designation:
PR
Mint Location:
Philadelphia
Mintage:
725
Coinage Type:
Three cent silver
Coinage Years:
1859-1873
Composition:
0.9 silver; 0.1 copper
PCGS #:
83716
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Subject: I would like to contribute catalog info to CDN for 1866 3cS PR CAM
Body: Referring page: http://www.greysheet.com/prices/item/1866-3cs-cameo-three-cent-silver-proof/gsid/3686 GSID: 3686 Title: 1866 3cS PR CAM
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Coin Value History
1866 3cS PR CAM
Value By Grade
1866 3cS PR CAM
CPG (retail) values
Currency
Grade Range
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Values
Greysheet & CPG® Values
3-Cent Silver 3cS Type 1, 1851-1853 PR [Type]
![3-Cent Silver 3cS Type 1, 1851-1853 PR [Type]](https://images.greysheet.com/Ctc/Catalog/20200815/254d9964-9488-433b-8df0-389914c4dd45.jpg?MaxWidth=200&Mode=Pad&Scale=UpscaleCanvas&format=webp)
Worth: $200,000 – $240,000
1851 3cS PR
Worth: $200,000 – $240,000
3-Cent Silver 3cS Type 2, 1854-1858 PR [Type]
![3-Cent Silver 3cS Type 2, 1854-1858 PR [Type]](https://images.greysheet.com/Ctc/CatalogEntry/legendauctions_hibid_com_lot_47237878-0.20200717044549369.jpg?MaxWidth=200&Mode=Pad&Scale=UpscaleCanvas&format=webp)
Worth: $1,500 – $60,000
1854 3cS PR
Worth: $6,000 – $54,000
1855 3cS PR
Worth: $3,000 – $40,000
1856 3cS PR
Worth: $2,000 – $36,000
1857 3cS PR
Worth: $1,800 – $30,000
1858 3cS PR
Worth: $1,500 – $60,000
3-Cent Silver 3cS Type 3, 1859-1873 PR [Type]
![3-Cent Silver 3cS Type 3, 1859-1873 PR [Type]](https://images.greysheet.com/ctc/catalog/18663csPR.jpg?MaxWidth=200&Mode=Pad&Scale=UpscaleCanvas&format=webp)
Worth: $400 – $17,000
1859 3cS PR
Worth: $500 – $8,400
1860 3cS PR
Worth: $400 – $12,000
1861 3cS PR
Worth: $400 – $20,400
1862 3cS PR
Worth: $400 – $9,000
1863 3cS PR
Worth: $400 – $24,000
1863/2 3cS PR
Worth: $470 – $13,200
1866 Silver Three-Cent Piece. JD-1. Rarity-3. High Date. Proof-65 Cameo (CACG).
$2,379
1866 3CS PR63 Cameo PCGS. PCGS Population: 14 in 63 Cameo, 60 finer (5/26). Mintage 725. ...
$1,281
1866 Silver Three-Cent Piece. Proof-64 Cameo (PCGS). CAC.
$1,920
1866 Silver Three-Cent Piece. Proof-66+ Cameo (NGC).
$3,120
1866 3CS PR67 Cameo PCGS. CAC. ...
$19,200
1866 3CS PR62 Cameo ANACS. . NGC Census: (1/30). PCGS Population (0/21). (#83716)...
$805
1866 Silver Three-Cent Piece. Proof-65 Cameo (PCGS).
$1,560
1866 3CS Three Cent Silver -- Obverse Struck Through -- PR63 Cameo NGC. NGC Census: (4/40). Mintage 725....
$1,213
3CS 1866 PCGS PR64 CAM GOLD CAC
$2,702
1866 3CS PR66+ Cameo NGC....
$3,120
1866 Silver Three-Cent Piece. Proof-67 Cameo (NGC).
$4,200
1866 3CS PR65 Cameo PCGS. CAC. PCGS Population: (12/20). NGC Census: (9/11). PR65. Mintage 725. ...
$1,680
1866 Silver Three-Cent Piece. Proof-63 Cameo (NGC).
$1,140
1866 3CS PR64 Cameo PCGS. CAC. PCGS Population: (17/24 and 1/6+). NGC Census: (17/18 and 1/2+). PR64. Mintage 725. ...
$1,320
1866 3CS PR66 Cameo PCGS. CAC. PCGS Population: (11/5). NGC Census: (7/4). PR66. Mintage 725. ...
$3,120
3CS 1866 PCGS PR67 CAM CAC
$13,512
1866 3CS PR65 Cameo PCGS....
$1,440
1866 3CS PR63 Cameo NGC. NGC Census: (4/35). PCGS Population (9/36). ...
$1,058
1866 3CS PR64 Cameo PCGS. CAC. PCGS Population: (17/24). NGC Census: (17/18). PR64. Mintage 725. ...
$990
1866 3CS PR66 Cameo NGC. NGC Census: (7/4). PCGS Population: (11/5). PR66. Mintage 725. ...
$2,640
Greysheet News
Stack's Bowers Galleries' Summer 2026 Global Showcase Auction Realizes Over $70 Million
10/7/2026
The Business of Numismatics: October 2026 Greysheet Editor's Letter
While reviewing the initial results in various categories of recent auctions, my initial take is that the sales were moderate to strong.
10/6/2026
Mack C. Chase Collection of Walking Liberty Half Dollars to Anchor Stack's Bowers Galleries' November 2026 Showcase Auction
More than 300 lots, consisting of high quality Walking Liberty half dollars from the Mack C. Chase Collection are set to cross the auction block as part of Stack's Bowers Galleries' November Showcase Auction, the official auction of the Whitman Expo.
10/6/2026
Events
Knoxville Coin and Currency Show - TN
Location: Rothchild Catering & Conference Center
Saturday, August 1, 2026
