Sell 2008 Undated 20p Mule Error
Genuine 2008 undated 20p mule values: £50–£100 circulated, up to £400 graded. Learn to spot fakes with 10× magnification checks and exact die-pairing diagnostics.
Typical UK collector & dealer range for circulated examples
Get Your Free Coin Valuation
Zero seller fees. Insured UK courier or private London & Manchester appointment.
Market Valuation & Pricing Notes
Values stable for a decade. Circulated examples trade £50–£100 on eBay UK (most sold listings £50–£60). BU examples realise £100–£200 at auction. PCGS/NGC MS65+ slabs fetch £200–£400. Not an investment-grade growth coin; famous error with reliable buyer pool but slow turnover.
Physical Authentication Checkpoints
Our specialists verify these exact specifications when appraising your 2008 Undated 20p Mule Error:
- Weight: 5.0 g (±0.1 g tolerance)
- Diameter: 21.4 mm (constant width heptagon)
- Edge: Plain, no milling or lettering
- Obverse: Ian Rank-Broadley 4th portrait of Elizabeth II, no date below truncation
- Reverse: Matthew Dent Royal Shield segment, no date below shield
- Date zones: perfectly smooth, unaltered fields on both sides where date would sit
- Magnification check: 10× loupe shows no tooling marks, scratches, or depressions in date area
- Metal: standard cupronickel ring test (non-magnetic, correct acoustic ping)
Coin Specifications
- Catalogue ID
- 2008-undated-20p-mule
- Denomination
- 20p
- Issue Year
- 2008
- Rarity Tier
- High-Value Error
- Mintage
- Unknown (Mint Error)
- Weight
- 5 grams
- Metal Composition
- Cupronickel (84% copper, 16% nickel)
Common Fakes & Variant Confusion
Counterfeits made by mechanically or chemically removing the date from normal 2008-dated coins. Fakes reveal scratches, pin-tool gouges, chemical etching residue, or slight depressions under magnification. Altered-date coins also appear where a 2009+ reverse is paired with a pre-2008 obverse; these show a date on one side only. Genuine mules have no date on either side with perfectly smooth fields.
Best Ways to Sell Your 2008 Undated 20p Mule Error
Compare liquidation routes in the UK, or sell directly to Finacforce with zero auction commission.
eBay UK (uncertified or slabbed)
Fastest for single circulated specimens (£50–£100). High visibility. Fees ~13% + PayPal. Risk of returns/disputes. Best with clear photos of both date zones.
Specialist UK auction houses (Baldwin's, Spink, Noonans)
Preferred for BU/slabbed examples (£150+). Hammer commission 15–20% but realised prices exceed private offers. Expert cataloguing adds credibility. Longer settlement (30–60 days).
Coin fairs / local dealers
Immediate cash, no fees. Offers typically 50–70% of retail. Limited buyer pool for this specific error.
Related Coins & Valuation Guides
2011 Olympic Aquatics 50p (Lines Over Face / Withdrawn Design)
Cupronickel (75% copper, 25% nickel)
1983 'New Pence' 2p Mule
Bronze (97% copper, 2.5% zinc, 0.5% tin)
2014 Lord Kitchener £2 Mule Error (Missing 'TWO POUNDS' Denomination)
Bimetallic: Outer ring - Nickel-Brass (76% Cu, 20% Zn, 4% Ni); Inner disc - Cupro-Nickel (75% Cu, 25% Ni)
Silver 2p Wrong Planchet Error
Cupro-nickel (75% Cu, 25% Ni) or nickel-plated steel (10p planchet)
1994 Bank of England £2 Gold Proof Mule (Double Sovereign Obverse)
22-carat gold (.917 fineness)
20p Struck on 1p Blank (Wrong Planchet Error)
Copper-plated steel (1p blank) / Bronze (pre-1992 1p blank)