An exceptionally rare 2018 Silver 5oz £10 Britannia from Great Britain, numbered among the first 100 coins struck in this prestigious series. Certified by NGC as Gem Proof, this limited-mintage piece combines historical significance with outstanding quality. The five-ounce silver content and flawless proof finish exemplify Royal Mint excellence. A highly sought-after acquisition for discerning collectors who value rarity, provenance, and investment-grade certification.