The last of these species (deniers d'or à l'écu) continued to be minted, and had wide currency through the reign of John up to their cessation in 1354. There was, however, great variation in the standard from fine gold to 23, 22 3⁄4, 21, and even 18 carats.
The reign of John was marked, 1361, by the commencement of the coining of the important franc d'or of fine gold, 63 to the mark = 20 sols. or 1 livre. Page 401
Its standard (of fine gold) was maintained under Charles V. and until Charles VII., but under the latter monarch the weight was reduced (to a tale of 80 to the mark).
Fleurs de lis d'or (or Florins d'or aux fleurs de lis) were first minted in 1365 by Charles V. They were of fine gold, and weighed exactly 1 gros. Being equivalent to the franc (i.e. equal to 1 livre or 20 sols.), it received the same name, being styled Franc à pied to distinguish it from the Franc d'or proper, which was styled Franc à cheval.
Saluts were first minted by Charles VI. in 1421 of fine gold, and of the same weight as the francs à cheval, but equal to 25 sols.
Couronnes or écus à la couronne were first coined by Charles VI. in 1384