Historically, a wax seal was used in correspondence ... the wax seal (stamp) was impressed into a small pool of melted wax, creating a wax seal that would securely bond a letter closed.
I have used antique wax seals, some dating back to the 14th century, from my personal collection to handcraft this wax seal jewelry.
The imagery on every wax seal is well researched so that I can share its meaning in heraldry and history, translate proverb and motto text inscribed in other languages and identify text so small that it is difficult to read.