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.
Black glass with silver & blue luster.
Cattail design with interior twinkle rim.