Amyntor is a bronze 12-pound cannon created in 1739 in Douai by founder Bérenger, Master of the Foundries of France.
The arrangement of decoration around the entirety of the firearm aligns with the royal order of October 7, 1732, and this piece is signed by Jean-Florent de Vallière (1667–1759).
This rich decoration is placed in such a way that the tailpiece has been sculpted to depict the head of gallinaceous bird. The first reinforce bears the French coat of arms and the sun, given that it was the king's personal emblem, along with the motto "NEC PLURIBUS IMPAR (not unequal to many)." The dolphin-shaped handles are attached to the second reinforce; finally, the barrage bears the coat of arms of the Grand Master of the Artillery, the weapon's motto Ultima Ratio Regum (The Last Argument of Kings) and the name of each part.
This cannon was seized by the French Navy in 1838 in San Juan de Ulúa, in Mexico.