Watch List notes:

The Milton Collection, British West Africa, George VI, shilling, 1952, trial striking in chromed-steel, crowned bust left, by Percy Metcalfe, legend without IND IMP, "TRIAL" in small raised capital letters behind head, rev. palm dividing date, value below, "TRIAL" in small raised capital letters parallel to palm, above 2 of date (FT 327; KM TS1), certified and graded by CGS as Mint State 67
Ex Lockdale's Auction 76 (21 January 2010), lot 409.
A number of these trial shillings were minted in the 1950s with which to test vending machines.
(200-250 GBP)