ConfusedFish

Thanks for that information. I appreciate it. No my coin is not the EEC. It's a 1977 Britannia.

I'm new to coin collecting and i am still learning things here and there. I recently bought a proof 50p 'new pence'. When it arrived the coin was twice as thick as a standard 50p. Is the standard 'new pence' 50p twice as thick or have I bought a piedfort coin without realising? Or are all proof coins twice the thickness? Any information will be greatly appreciated.