Introduction
Coin collecting has long been a fascinating hobby, and every now and then, a rare find emerges that is worth significantly more than its face value. One such example is the 20p coin, which, under the right conditions, can be worth up to 250 times its original value. If you have an old 20p coin, you might want to check if it’s one of the rare editions that collectors are willing to pay a small fortune for.
This article delves into the history of the 20p coin, the rare versions that fetch high prices, how to identify valuable pieces, and where you can sell them. We’ll also provide a detailed table of valuable 20p coins, a guide to assessing coin worth, and a section addressing frequently asked questions.
History of the 20p Coin
The 20p coin was first introduced in the United Kingdom in 1982 as part of the decimal currency system. Designed to bridge the gap between the 10p and 50p coins, it features the image of Queen Elizabeth II on the obverse and various reverse designs over the years, including the iconic Tudor Rose and later, a segment of the Royal Shield.
The Rare 20p Coin Without a Date (2008 Error Coin)
One of the rarest and most sought-after versions of the 20p coin is the undated 2008 version. Due to a minting error, thousands of these coins were produced without a date—a rarity in modern numismatics. As a result, these undated 20p coins have become highly valuable, with some selling for as much as £50 to £250 in auctions and private sales.

Table of Valuable 20p Coins and Their Estimated Value
Coin Type | Year | Notable Feature | Estimated Value |
---|---|---|---|
Undated 20p Coin | 2008 | No date on either side | £50 – £250 |
Early 20p Proof Coins | 1982-1984 | Special minting for collectors | £100 – £500 |
Minting Error 20p Coins | Various | Misprints, double strikes, off-center strikes | £50 – £1,000 |
Rare 20p Mule Coins | Various | Incorrect pairing of dies | £100 – £2,000 |
Commemorative 20p Coins | 2009-Present | Special releases with unique designs | £10 – £150 |
How to Identify a Valuable 20p Coin
1. Check for the Missing Date (2008 Error Coin)
The 2008 undated 20p coin is one of the most famous error coins in UK history. Normally, all coins have a date either on the obverse (heads) or reverse (tails) side. However, due to a minting mistake, a batch of 20p coins in 2008 was produced without a date, making them exceptionally rare.
To check if you have one:
- Look at both sides of your 2008 20p coin.
- If neither side has a date, you may have an error coin worth hundreds of pounds.
2. Examine for Minting Errors
Minting errors can significantly increase a coin’s value. Some errors that make 20p coins valuable include:
- Off-center striking: The design appears shifted.
- Double striking: The coin has overlapping images due to being struck twice.
- Wrong metal composition: A 20p coin mistakenly minted on a different metal blank.
3. Identify Mule Coins
A mule coin occurs when two dies that were not meant to be paired together are used in minting. Some rare 20p coins have been discovered where the obverse does not match the correct reverse, making them highly valuable.
4. Proof and Commemorative Coins
Certain early proof coins (1982-1984) and commemorative editions can also be valuable. These were often released in limited quantities and intended for collectors.
5. Condition and Grading Matters
Like all valuable coins, condition plays a significant role in price. Coins are graded on a scale from Poor (P-1) to Mint State (MS-70). The higher the grade, the more valuable the coin.

Where to Sell Valuable 20p Coins
If you have a rare or valuable 20p coin, you have several options for selling it:
- Online Marketplaces: Websites like eBay and CoinHunter.co.uk allow sellers to auction rare coins to interested buyers.
- Numismatic Auctions: High-end auction houses, such as Heritage Auctions, specialize in selling rare coins to serious collectors.
- Coin Dealers: Professional dealers can assess and buy your coin directly.
- Coin Shows and Expos: Attending coin collector events gives you access to potential buyers and expert appraisals.
- Grading Services: Submitting your coin to PCGS or NGC for grading can enhance its value and make it easier to sell.
Conclusion
The 20p coin, particularly the 2008 undated version, is a hidden treasure among UK currency. While most 20p coins are worth their face value, rare versions with errors, unique designs, or historical significance can be worth hundreds or even thousands of pounds.
If you suspect you own a rare 20p coin, check for distinguishing features such as missing dates, minting errors, or mismatched dies. Once confirmed, you can explore selling options through online marketplaces, professional dealers, or high-end auctions. With a bit of luck, your spare change might turn into a small fortune!
FAQs
1. How can I tell if I have an undated 20p coin?
The 2008 undated 20p coin has no date on either side. If you check both the heads and tails of your 20p and don’t find a year, you likely have a valuable error coin.
2. How much is a 20p coin without a date worth?
Depending on its condition, an undated 20p coin can be worth anywhere from £50 to £250 or more in auctions.
3. Where can I sell my valuable 20p coin?
You can sell it on eBay, CoinHunter.co.uk, numismatic auctions, or through coin dealers. If your coin is extremely rare, consider getting it professionally graded first.
4. What other rare 20p coins should I look out for?
Aside from the undated 2008 coin, other valuable 20p coins include proof versions from 1982-1984, commemorative editions, and minting errors such as double strikes or misprints.
5. Do all 20p coins have the same design?
No, the design of the 20p has changed over the years. The most famous versions include the Tudor Rose design (1982-2008) and the Royal Shield segment (2008-present). Special editions and commemorative releases may feature unique designs.