Watch List notes:

Henry IV (1399-1413), Groat, Light Coinage, Tower, type I, from altered dies of Richard II, 1.89g, 8h (Potter I-3/I-1 [Richard II]; BNJ 1960, pl. VIII, 4/1 same dies; N.1358; S.1726/1681), a large creased fragment missing approximately one quarter of the flan, accordingly poor, otherwise legible and very rare.
Purchased Mansfield, Nottinghamshire, 2 January 2013
Estimate: £20 - £40