Watch List notes:

James VI (1567-1625), Two Merks or Thistle Dollar, 1579 over 78, crowned arms, reverse large thistle between I and R, wt. 22.43g., (B. – this altered die; S. 5480 but this variety seems to be unrecorded). About fine for issue, extremely rare.

Ex. Spink Auction 29th March 2006, lot 172.
Ex. Spink Numismatic Circular March 2010.