Watch List notes:

The L'Abbaye Collection | Charles II (1660-1685), Mule 'Plume' Shilling, 1679, second bust, plume below, rev. no stop after HIB, six strings to harp, edge obliquely milled, 5.52g, 6h (Bull 547; ESC 1057 [R3]; Pywell-Phillips -; Spink 3378), only mediocre to good, but extremely rare.
Provenance
SJA 5, 27 September 2006, lot 355 - £320
Estimate: £250 - £350