Eimer 1251, BHM 1475.
33mm. By W.Wyon.
The Official Royal Mint issue. Conjoined busts of King William IV & Adelaide Queen Consort.
Slabbed and graded by NGC as MS64BN.
The certification number for this medal is 2121632-006.
This medal has the very unusual distinction of having the obverse lettering and most of the bust, double struck. It is very unusual to find Coronation medals with such an error.