Here is an example of a pattern farthing issued in the mid 17th century, dated 1665, which was bought late last year and will go to NGC for grading soon. This is catalogued as Peck 423, an extremely rare long hair variety , the dies for which were apparently made by John Roettier, who apparently helped to introduce machine made coins to England. There are a lot of varieties of 1665 farthings, made over a number of years. This piece, virtually as struck, is one of the better ones I have seen.