Elizabeth II, 4-Coin Gold Proof One Pound Set 2004-2007, obvs. Queen's portrait by Rank Broadley, the reverses of each £1 feature famous bridges, each representing one of the four constituent parts of the UK & comprise: 2004 'The Firth of Forth Railway Bridge' (Scotland), 2005 'Menai Straits Bridge' (Wales), 2006 'Egyptian Arch Railway Bridge' (Northern Ireland) & 2007 'Gateshead Millennium Bridge' (England); each pound weighs 19.6g 22ct gold; with numbered certificates of authenticity, individually encapsulated in Royal Mint case of issue, FDC