Watch List notes:

The Milton Collection, East Africa, George VI, Specimen cupro-nickel shilling, 1949 H, Heaton mint, by Percy Metcalfe and Kruger Gray, crowned head left, rev. lion to r., above value and date (KM 31), certified and graded by PCGS as Specimen 65
Ex Diana Collection, Baldwin's Auction 59 (24 September 2008), lot 1547, first coin.
The Diana catalogue states that there were 14 such coins in the Heaton Mint Archival Collection.
(150-180 GBP)