No numbers on the sides is probably a clue. Now, on many of them each hole is a different width, it is hard to understand the culture and mannerisms that long a

No numbers on the sides is probably a clue. Now, on many of them each hole is a different width, it is hard to understand the culture and mannerisms that long ago but i find it improbable that could be used in a quick game of chance to see what has been rolled.