Comments by "SmallSpoonBrigade" (@SmallSpoonBrigade) on "" video.

Probably, although wax was also commonly used back then to color things like buildings. A lot of the Greek temples were very colorful back then, but since then the color mostly disappeared. I do think that it's the most likely explanation, but I could also see the nubs being used as pivot points and you could quickly put different rods into the different holes to convert between different weights.
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That's quite possible. It just sort of surprises me that nobody has found a vintage set that still had some residue in there to analyze. It may even be that the 3rd type wasn't ever standardized.
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