Watch List notes:

BRITISH COINS, Philip and Mary, Silver Shilling, 1554, profile busts facing each other, crown above, full titles, rev crowned quartered shield of arms, value above, 5.98g (N 1967; S 2501). Tiny edge peck to obverse 5 o'clock, bold and pleasing fine, lightly toned.
from the David Sellwood collection

Estimate: £800-1000