The collection of medieval wax seals dates back to the 13th - 15th century, with a few post medieval 16th century wax seals, and they are non heraldic personal seals. The seals were small and most look like little chess pawns but some were designed as pendants.  The engravings on the seal matrix were crude, vigorous, and rustic.  Most had Latin legends, or words, engraved in the reverse, around the edge of the central design and sometimes the engraver would forget to engrave a letter or two in the reverse or run out of room for all the letters needed so these legends can be tricky to read and translate from Latin.