Salesman's cards would often have variations of the same button for buyers to choose from. These black glass buttons have differing tints.
If artist Hieromymous Bosch designed antique French buttons, I imagine they’d look like worms with heads & snakes. My reference book says these are Seps, snake-like mythological creatures with the heads of other animals. What do you see? I see a rabbit, dog & cat heads.
Grapes were a popular theme among Victorian buttons. Grapes often represented Christ the with fruit & leaves symbolizing the Christian faith. Grapes themselves represented the sacrificial blood of Christ. The leaves stood for rebirth. The vines a representation of bounty.
Grapes are one of the earliest cultivated crops & the fruit & their vines are sacred to Bacchus, the Roman god of wine. As such, these vines take on a jovial symbolism, representing celebration & abundance.
These are just a few examples of antique buttons with a grape motif.
A Bacchante or Maenad, female followers Bacchus, the god of wine.
Carved mother-of-pearl over abalone.
Perhaps it was the influence of heraldry images on livery in the UK. Or it may have been the Arthurian revival in fiction & non-fiction stories of the 19th century that made armor & weaponry a popular subject for Victorian buttons. The last button above depicts Jean La Hache, aka Jeanne Hachette, a French heroine who helped to defend the town of Beauvais in 1472. She took an ax to an invading soldier who had scaled the city walls & was joined in battle by other women to defend their town. In this scene she is poised to attack one man while another falls to his death. The city celebrates with a holiday in her honor every June.