Medieval silver halfpenny of king Henry VI leaf-pellet issue London

This is a medieval silver halfpenny (1/2 pence) of King Henry VI, minted in London between 1445 - 1454 AD. It is from the Leaf-pellet issue. 

Obverse: Crowned facing bust, leaf on breast and pellets by crown legend reads: + HENRIC REX ANGLI "Henry King of England"

Reverse: Long cross pattée dividing the legend, with three pellets in each angle. legend surrounding,  CIVITAS LONDON,  "City of London" Extra pellets in 2 quarters

DENOMINATION: Halfpenny (1/2d)

CULTURE: Medieval England

MONARCH: Henry VI

DATE: 1422 - 1461 AD (this coin issued between 1445-1454 AD)

MATERIAL: Silver

SIZE: 13.8mm diameter

WEIGHT: 0.42 grams

ATTRIBUTION: Spink #1928, North #1512

PROVENANCE: Formerly in a private collection in Norfolk, United Kingdom