50 Pence - Elizabeth II Team GB Olympics, Silver Piedfort

Piedfort coins — struck at double the standard thickness on specially prepared planchets — have been a Royal Mint collector vehicle since their modern revival in 1982. This particular issue belongs to the sprawling 2016 Rio Olympics Team GB series, which the Mint released across multiple formats and metals throughout the year as British athletes ultimately finished second in the gold medal table, the nation's best Olympic performance in over a century.