Watch List notes:

Halfpenny 1723 struck on a thin flan of 6.73 grammes (103.86 grains) as Peck 803 (average weight for the standard coins of this series is 150 grains, range 144 to 160 grains) VG to Near Fine with surface corrosion, we note Peck 804 described as 'very thin flan' weighs 72.1 grains, so this coin some what between the two types

Estimate: 20-40 GBP