Check your 20p coins - could be worth £50!

[Boss Hog]

A technical error at the Royal Mint led to up to 200,000 coins entering circulation without a date for what is thought to be the first time in more than 300 years...

Mix-up at Royal Mint creates dateless 20p pieces worth £50 - Telegraph

[CYoung]

I checked my 'piggy bank' and found one exactly like it on the back, then turned it over and to my horror "2008" - what a let down that was. They're on ebay already

[Boss Hog]

People have said that they will be collectors items one day, 200k in circulation though which is quite a lot for them to be rare....although, I don't have one! ....anyway, I only use large notes

[NeedForBleed]

Got a dateless £50, worth 20p apparently.

[CYoung]

Little hint for my GDF friends. If you have one with the new tails side with 2008 on the front on ebay my brother got £5 even though its still worth 20p. Seems to be the case that people don't know what they're looking for.