[Shryke]

I noticed -- but that still didn't make any sense. Now, percentile dice can be set to 00, but that usually indicates 100, not 0.

Not true. The original 20 sided dice had 0-9 on them, twice. The 10-20 values were represented by a line under the numeral. Thus, a ten was a "0", and a twenty was a "0"

[AzSteven]

Not true. The original 20 sided dice had 0-9 on them, twice. The 10-20 values were represented by a line under the numeral. Thus, a ten was a "0", and a twenty was a "0"

And the plastic used in those early dice included in some of the older D&D editions was SO poor. I still have a d12 and d20 from a set I bought in 1977, and they are both worn to nearly perfect spheres - they wobble around forever before they finally settle on a number.