the 1668 issue....
"Although having the characteristics of a token, the penny issued in 1668 by John Murrey, an opulent trader in Douglas, merits a listing in the section by virtue of being the only piece specifically excluded from the Tynwald act of 24th June 1679, which prohibited the distribution and use of many of the tokens in circulation on the island, even including the Irish St Patrick pieces and Butchers' tokens. The Murrey pieces, known locally as 'Johnny Murrey's pennies', were thus immediately elevated to the status of a legal coinage [...]
[...] the Murrey penny, poorly struck in brass, bears a typical 17th century token obverse with the issuer's name, and a reverse depicting the triune with it's customary legend. A variety bears a legend instead of a triune."
Coincraft, 1999