Watch List notes:

Sovereign 1820 Roman 1 in date, the top of the 1 with a shorter top right serif, Marsh 4C, (plate 4, 2002 Edition) Spink 3785C stated by them to be Extremely Rare with no price given, pleasing and even VF or better. An excessively rare variety, the first we have ever seen, with no example in the Bentley or Park House Collection none recorded by NGC and one by PCGS

Estimate: 5000-10000 GBP