Watch List notes:

British Coins, George V, matt proof halfcrown, 1911, bare head l., rev. crowned shield within Garter (S.4011; cf. ESC.758; cf. Bull 3710), certified and graded by NGC as Proof 61 Matte, extremely rare
A great rarity, in 1997 Baldwin's sold a Matte Proof £2 of 1911. In the Royal Mint collection there is a sovereign, half crown, florin and sixpence. This half crown is the only known specimen in private hands
(2500-3500 GBP)