Ray Williams writes:

Serpent Pandora's Breeches, 1792, designed by Thomas Spence, London. It depicts Priestley as a serpent below a burning pair of straw-filled pants, labeled "Pandora's Breeches."

If the plot to burn down Parliament had succeeded, the token implies that all hell would have broken loose, just as in the myth of Pandora's box.

To read the complete posts, see:
Its Friday and the weekend is here....post anything you want(https://forums.collectors.com/discussion/807536/its-friday-and-the-weekend-is-here-post-anything-you-want)
https://www.cointalk.com/threads/lets-see-your-conder-tokens.107719/page-20

To read the earlier E-Sylum article, see:
NOTES FROM E-SYLUM READERS: AUGUST 8, 2021 : The Three Thomas's(https://www.coinbooks.org/v24/esylum_v24n32a15.html)