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Whitman Expo
- U.S. Coins /
- Half Dollars /
- Capped Bust Half Dollars (1807–1839) /
- 1820 50c Square Base 2, Knob 2 MS
50C 1820 O-105. SQ. 2, LG. DATE, KNOB 2. PCGS AU58
Source: Legend Auctions
1820 Square Base 2, Knob 2 50c CAC XF DETAILS
Source: CAC Grading
1820 50c Square 2 Large Date Knob 2 PCGS XF40
Source: David Lawrence Rare Coins
1820 50c Square 2 Large Date PCGS VF25
Source: David Lawrence Rare Coins
1820 50c Square 2 Large Date PCGS XF45
Source: David Lawrence Rare Coins
1820 50c Square 2 Large Date DGS AU50 (O-105; Cleaned)
Source: David Lawrence Rare Coins
1820 50c NGC AU55 (O-105, Square Knob 2, Large Date)
Source: David Lawrence Rare Coins
1820 50c NGC/CAC AU55 (Large Date, Square Knob 2, O-105)
Source: David Lawrence Rare Coins
1820 50c NGC XF40 (Square 2, Large Date, O-106)
Source: David Lawrence Rare Coins
1820 50c PCGS AU53 (Square 2, Large Date, Knob 2) - No Reserve!
Source: David Lawrence Rare Coins
1820 50c NGC XF45 (Square 2, Large Date, O-106)
Source: David Lawrence Rare Coins
1820 50c NGC XF45 (SQ Knob 2, Large Date)
Source: David Lawrence Rare Coins
1820 50c PCGS/CAC AU55 (Square 2, Large Date)
Source: David Lawrence Rare Coins
1820 50c PCGS XF45 (Square 2, Large Date, Knob 2)
Source: David Lawrence Rare Coins
1820 50c NGC XF40 (Square Base 2, Knob)
Source: David Lawrence Rare Coins
1820 50c PCGS XF45 (Square Base 2, Knob)
Source: David Lawrence Rare Coins
1820 50c PCGS/CAC XF45 (Overton 105, Square Base 2, Large Date, Knob 2)
Source: David Lawrence Rare Coins
1820 Capped Bust Half Dollar. O-104. Rarity-4+. Square Base Knob 2, Large Date. Good-6 (PCGS).
Source: Stacks Bowers
1820 Square Base 2, Knob 2 50c CAC XF DETAILS
Source: CAC Grading
1820 50c Square 2 Large Date Knob 2 PCGS XF40
Source: David Lawrence Rare Coins
1820 50c Square Base 2, Knob 2 MS
Greysheet & CPG® Values
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Mint & Coinage Details
Mint Location:
Philadelphia
Mintage:
751,122
Coinage Type:
Capped bust half dollar
Coinage Years:
1807-1836
Composition:
89% silver; 11% copper
Varieties and Classification
Variety:
Square Base 2, Knob 2
Physical Characteristics
Fineness:
0.89
Weight:
13.48 gr
Weight:
0.4755 oz
Precious Metal Weight:
0.3868 oz
Strike Type:
Business
Diameter:
32.5 mm
Coin Shape:
Round
Design Details
Designer:
John Reich
Obverse Lettering:
LIBERTY, 1820
Obverse Designer:
John Reich
Reverse Lettering:
UNITED STATES OF AMERICA, E PLURIBUS UNUM, 50 C.
Reverse Designer:
John Reich
Feedback:
From the Greysheet Marketplace
Buy Now: $25,000.00
Buy Now: $1,025.00
Buy Now: $8,995.00
Buy Now: $14,500.00
Buy Now: $8,950.00
Buy Now: $385.00
Buy Now: $575.00
Auction Ends: 6/15/2026
Buy Now: $75.00
Buy Now: $75.00
50C 1820 O-105. SQ. 2, LG. DATE, KNOB 2. PCGS AU58
Source: Legend Auctions
1820 Square Base 2, Knob 2 50c CAC XF DETAILS
Source: CAC Grading
1820 50c Square 2 Large Date Knob 2 PCGS XF40
Source: David Lawrence Rare Coins
1820 50c Square 2 Large Date PCGS VF25
Source: David Lawrence Rare Coins
1820 50c Square 2 Large Date PCGS XF45
Source: David Lawrence Rare Coins
1820 50c Square 2 Large Date DGS AU50 (O-105; Cleaned)
Source: David Lawrence Rare Coins
1820 50c NGC AU55 (O-105, Square Knob 2, Large Date)
Source: David Lawrence Rare Coins
1820 50c NGC/CAC AU55 (Large Date, Square Knob 2, O-105)
Source: David Lawrence Rare Coins
1820 50c NGC XF40 (Square 2, Large Date, O-106)
Source: David Lawrence Rare Coins
1820 50c PCGS AU53 (Square 2, Large Date, Knob 2) - No Reserve!
Source: David Lawrence Rare Coins
1820 50c NGC XF45 (Square 2, Large Date, O-106)
Source: David Lawrence Rare Coins
1820 50c NGC XF45 (SQ Knob 2, Large Date)
Source: David Lawrence Rare Coins
1820 50c PCGS/CAC AU55 (Square 2, Large Date)
Source: David Lawrence Rare Coins
1820 50c PCGS XF45 (Square 2, Large Date, Knob 2)
Source: David Lawrence Rare Coins
1820 50c NGC XF40 (Square Base 2, Knob)
Source: David Lawrence Rare Coins
1820 50c PCGS XF45 (Square Base 2, Knob)
Source: David Lawrence Rare Coins
1820 50c PCGS/CAC XF45 (Overton 105, Square Base 2, Large Date, Knob 2)
Source: David Lawrence Rare Coins
1820 Capped Bust Half Dollar. O-104. Rarity-4+. Square Base Knob 2, Large Date. Good-6 (PCGS).
Source: Stacks Bowers
1820 Square Base 2, Knob 2 50c CAC XF DETAILS
Source: CAC Grading
1820 50c Square 2 Large Date Knob 2 PCGS XF40
Source: David Lawrence Rare Coins
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About CDN Prices
All CDN prices are based on proprietary market knowledge and technology developed by CDN Publishing, LLC.
CPG® prices represent retail levels. Collectors should refer to CPG values as a starting place for their negotiations, or auction bid reference.
Greysheet/Greensheet prices are wholesale market levels for collectible coins/paper money intended to indicate what a dealer, or wholesale, buyer would pay for the described item in the specified grade. Greysheet/Greensheet represent "sight-seen" values based on a buyer's in-hand review. The actual value can be more or less than this depending on factors including eye appeal and market timing.
Bluesheet (NGC & PCGS) prices represent the highest sight-unseen offers to buy on dealer networks like CDN Exchange. In many cases, there are no active sight-unseen buy offers, so CDN looks to the recent lowest market values for such an item. For this reason, Bluesheet values typically represent the floor of the market for the specified item. CDN only tracks Bluesheet on certain items.
CAC prices are for U.S. coins that meet the standards of the Certified Acceptance Corporation. You can learn more about CAC on their web site.
Price movement is indicated for price changes in the last 30 days.
The prices listed in our database are intended to be used as an indication only. Users are strongly encouraged to seek multiple sources of pricing before making a final determination of value. CDN Publishing is not responsible for typographical or database-related errors. Your use of this site indicates full acceptance of these terms.