Watch List notes:

Henry IV (1399-1413), Halfgroat, Heavy Coinage, Tower, 2.07g, 5h, m.m. cross pattée, star on breast, rev. truncated i in posvi, unbarred ns in london, (DIG 2/1; Potter 2/1; Stewartby IV, 1214, same obverse die; N.1346; S.1718), soft in parts, otherwise about very fine, extremely rare, one of only four examples thought available to commerce, with three more in institutional collections.
provenance
D I Greenhalgh, part I, DNW 99, 14 March 2012, lot 63
Found Lincolnshire, 2001 (via Vosper ~ 'same reverse die as Lockett')
Estimate: £4,000 - £5,000