Watch List notes:

Tristan da Cunha 2018 'Defence Of Our Skies' a 3-coin set in gold comprising Sovereign 2018 Reverse: Supermarine Spitfire, Half Sovereign 2018 Reverse: Sopwith Camel and Quarter Sovereign 2018 Hawker Hurricane Proofs FDC, each coin has a coloured Union Jack background on the reverse, boxed with certificate and 72-page book 'Defence of Britain's Skies' by Stewart Binns

Estimate: 500-650 GBP