Watch List notes:

SCOTLAND. Charles I. 1625-1649. AR Twenty pence (16mm, 0.77 g, 6h). Third coinage, Briot's issue, type I. Edinburgh mint; im: B. Struck circa 1637-1642. Crowned bust left; XX (mark of value) behind; horizontal B below beard / Crowned thistle; horizontal B above crown. SCBI 35 (Ashmolean & Hunterian) 1407; SCBC 5584. Toned, minor roughness. VF. Well struck for issue.

From the Dr. William E. Triest Collection.