Watch List notes:

BRITISH COINS, James I, Silver Half-Groat, Third Coinage (1619-1624), crowned rose, beaded circles and legend surrounding, initial mark thistle (1621-1623) both sides, rev crowned thistle, no stops in legend, 1.07g (N 2127; S 2671). About extremely fine and toned, scarce.
from the David Sellwood collection

Estimate: £100-150