Henry VI (First reign, 1422-1461), Leaf-Trefoil issue [B], Groat, London, mm. crosses IIIb/V, no leaf on breast, trefoil after rex, leaf before lon, trefoil after don, 3.76g/2h (Whitton 26d; N 1486; S 1898). Very fine or better £120-150

The reference is Whitton 26c