Watch List notes:

SCOTLAND. Charles I. 1625-1649. AR Twenty pence (16mm, 0.76 g, 3h). Third coinage, third (Falconer's first) issue. Class III. Edinburgh mint. Struck circa 1637-1642. Crowned bust left; XX (mark of value) behind / Crowned thistle; F above crown. Cf. SCBI 35 (Ashmolean) 1484-91 (for type); SCBC 5588. Lightly toned, adjustment marks. Near VF.

From the James & Martha Robertson Collection. Ex Coin Galleries (23 April 2003), lot 256.