Half Sovereign 1845 with large (tall) first A in BRITANNIARUM, as Marsh 419, Near Fine, examination of our photo archive stretching back to 2003 shows that none of the examples of 1845 Half Sovereigns previously offered by us have that variation. Marsh lists the rarity of the 1845 coin as R3, with a calendar year mintage of 887,526 pieces, so logical combination of these factors surely makes this an extremely rare type.
Estimate: 300-350 GBP