GREAT BRITAIN George III, Death of, 40.8mm silver medal 40.26 grams by Thomas Webb (BHM 999 - not listed in silver, only bronze)
Obverse: Laureate head facing right, HOC AVSPICE ORBE SALVS / MUDIE .D. / MDCCCXVII / WEBB .F. (Trans: The Safety of the World Under his Rule) MDCCCXVII (1817)
Reverse: HIS MAJESTY / GEORGE III / BORN OLD STYLE MAY 24, 1738 / ACCESSION NEW STYLE / OCT. 25. 1760. / MARRIED SEP. 8. 1761. / CROWNED SEP. 22. 1761. / DIED JAN. 29. 1820 FULL OF / YEARS, HONORS, SUFFERINGS, / BELOVED & LAMENTED / BY THE BRITISH / NATION
British Historical Medals lists the bronze version as rare, and in silver it is not listed, hence it should be considered of the highest rarity. It is not unique as in going through auction records and fixed price lists I was able to locate a previously sold example in the London dealer, Timothy Millet's website archives.
Thomas Webb (1797 - 1822) was an English coin and medal engraver. He is associated with the Royal Birmingham Society of Artists. Webb worked for the noted metal producer, Sir Edward Thomason (1769-1849).
James Mudie in 1820 as a private venture had issued, a set of 40 medals to commemorate British victories over the French spanning a 20 year period, from 1797 to 1817. The obverse of BHM 933, which is part of that series is the same as BHM 999.