From my understanding Alexis, talismanic numerals placed in this context are usually pretty personal. I don't think anyone could tell you exactly what any of this means beyond the original owners and perhaps the person who inscribed them. But letters and words can also be ascribed numerical value in certain alphabets and these arrangements of numbers become a code. I would not be surprised if many of these relate to passages in the Koran intended to have some great magical value in their inscription.
If you are planning on having your Madura pandai whip up some new versions of these i would think twice.
