2017 represents a dual anniversary for Great Britain's iconic Britannia coins, with the gold coin celebrating 30 years and the silver version marking it's 20th anniversary.Since it's original debut in […] 2017 Proof Britannia Gold and Silver Coins RevealedAugust 4, 2017 in New Releases / Royal Mint tagged 2017 / gold / Great Britain / proof / Royal Mint / SIlver / UK by Numisman