Watch List notes:

Elizabeth II (1952-), gold 3-coin proof Half Sovereign portrait Set, 1982, 1987, 2004, crowned head right, engraved by Arnold Machin, Raphael Maklouf, and Ian Rank-Broadley respectively, Latin legend and toothed border surrounding, rev. St. George and dragon right, date in exergue, B.P. to upper right of exergue for designer Benedetto Pistrucci (S.SB1, SB2, SB4). All as struck, in Royal Mint box with certificate of authenticity.

The Latin legend translates as "Queen Elizabeth the second, by the grace of God, Defender of the Faith."
Estimate: £400-600