Watch List notes:

BRITISH COINS, MILLED GOLD SOVEREIGNS, Elizabeth II, Gold Sovereigns (3), 1962, 1963, 1964, young laureate head right, rev St George slaying dragon with sword, date in exergue, tiny b.p. to upper right (Bentley 372, 374, 375; Marsh 300, 301, 302; S 4125). All with light nicks, bagmarks and hairlines, otherwise generally good extremely fine. (3)
Calendar year mintages 3,000,000; 7,400,000; 3,000,000 respectively
The Calendar outputs from here onward are taken from Michael Marsh's The Gold Sovereign.

Estimate: £550-650