1820 Capped Bust Half Dollars : Square Base Knob 2 - Large Date

What This Coin Looks Like (Obverse, Reverse, Mint Mark Location, Special Features, etc.):

One major variety is the 1820 Capped Bust Half Dollar which features a square base on the number "2" in the date. The bottom of the "2" is flat and square opposed to the other variety that has a curved and curled base. This variety features a larger date as well.

The difference between the 1820 Square Base 2 vs Curl Base 2 is depicted below in the example comparison image:



The 1820 Square base "2" variety also has two sub-varieties as well. This variety features a knob on the upper tip of the "2" while the other variety doesn't have the knob and instead curls around a bit more. The difference between the knob 2 vs no knob 2 is depicted below in the example image:



Lastly - the difference between the small date vs large date is also depicted below:

Coin Value Chart: Typical Coin Prices, Values and Worth in USD based on Grade/Condition. Numismatic portion of the values last updated February 2026, precious metal portion of the values is updated live!

Good (G-4)	Very Good (VG-8)	Fine (F-12)	Very Fine (VF-20)	Extremely Fine (EF-40)	About Uncirculated (AU-50)	Uncirculated (MS-60)	Uncirculated (MS-63)	Proof (PR-63)
$140	$193	$235	$330	$738	$1,260	$4,086	$7,827	-

USA Coin Book Estimated Value of 1820 Capped Bust Half Dollar (Square Base Knob 2 - Large Date Variety) is Worth $193 in Average Condition and can be Worth $4,086 to $7,827 or more in Uncirculated (MS+) Mint Condition. Click here to Learn How to use Coin Price Charts. Also, click here to Learn About Grading Coins. The Melt Value shown below is how Valuable the Coin's Metal is Worth (bare minimum value of coin). Click here to see the Melt Value of every US Coin.


MELT VALUE: $23.34