Watch List notes:

British Coins, Victoria, proof crown, 1847, plain edge, struck in pure silver, 'Gothic' bust l., rev. crowned, cruciform shields (S.3883; ESC.291B; Bull 2578), lightly toned, certified and graded as Proof 60, very rare
In the cataloguers opinion the coin has been vastly undergraded.
(4000-6000 GBP)