Great Britain 2009-2012 £5 Olympic Countdown Silver Set (Piedfort Double-Thick Version)

Denomination: £5 GBP (each coin) Diameter: 38.6 mm Weight: 56.56 g (each coin, double-thickness piedfort version)

Obverse: Same Queen Elizabeth II portrait. Reverse: Identical Olympic countdown designs, but struck on a thicker planchet, making them more exclusive. Coins in the Set (Piedfort Version): 2009 Countdown Coin (Piedfort) 2010 Countdown Coin (Piedfort) 2011 Countdown Coin (Piedfort) 2012 Countdown Coin (Piedfort)

Significance: Piedfort coins are struck in smaller quantities than standard proofs, making them rarer. Double the silver content of the standard version. Highly sought after by serious numismatists due to their limited mintage and exclusivity.