Halfpenny Pattern -
William and Mary (1688-1694), Pattern (?) for a Halfpenny, unsigned, in copper, undraped laureate bust of William right, rev. undraped bust of Mary right, edge plain, 6.98g/7h (BMC 631; Montagu 2; cf. DNW 148, 530). Extremely rare. Ex George Bates, provenance: DNW Auction 57, 19 March 2003, lot 632.
Unusually, Mr Bates owned no less than three examples of this extremely rare piece, of which less than 10 specimens are believed extant.