GREAT BRITAIN. Groat, ND (1638-42). Aberystwyth Mint; mm: Book. Charles I. NGC AU-58. S-2893; KM-91; N-2338. Weight: 2.08 gms. Obverse: Crowned and mantled bust left, wearing ruffled collar; plumes to left, IIII (mark of value) to right; Reverse: Garnished coat-of-arms. Sole finest certified of the type.