1483-1485 AD Medieval England silver Groat of king Richard III London Sun & Rose

Description

This is a medieval silver groat (four pence) of
King Richard II
I
, minted at London between 1483 - 1485 AD.
Obverse: Facing bust of Richard within a tressure of nine arcs, an annulet either side of neck. Legend reads:
RICARDx DIx GRAx REX AnGLx Z FRAn
, "
Richard, by the grace of God, King of England and France.
"
Reverse:  Long cross pattee, tri-pellets in each inner angle, beaded circles and twin concentric legend surrounding:
POSVI DEVmx A DIVTOR E' mEVm
"
I have made God my helper
," a Psalm from the Bible.:
CIVI TAS LOn DOn
,"
City of London
" double saltire stops on the inner circle.
DENOMINATION:
Groat
CULTURE:
Medieval England
MONARCH:
Richard III
DATE:
1483 - 1485 AD
MATERIAL:
Silver
SIZE:
25mm diameter
WEIGHT:
2.79 grams
ATTRIBUTION:
N.1679; S.2157
This coin is unconditionally guaranteed be an original and
to date from the period described. A certificate of authenticity will be supplied on request