Operating in the late 18th and early 19th century, the firm of Thomason & Jones issued numerous medals, buttons, and other struck metal exonumia. As with most other private Mints of the period, this was a family affair. Sir Edward Thomason (c. 1769 – 29 May 1849) was the son of a buckle-manufacturer from Birmingham. He actually apprenticed at the more well known Boulton Mint  at Soho from the age of 16. Shortly thereafter, Thomason took over his fathers firm in 1793 and began his extensive output.

While perhaps his most well known piece was the Cartography medal featuring the Eastern and Western Hemispheres, his prolific medallic output spanned scientific, cultural, and historic themes. One such example of  this was his series of medals depicting the Kings and Queens of England which were produced with reworked Dassier dies. This particular medal was created wholly by Thomason, and other than the Pistrucci coronation medal, this medal displays  perhaps the most delicately rendered portrait of the king.