yup the original d20's were labeled 1-10 twice, and you used a crayon to colour the on set differently. If it landed on your "blue" 10 it was a 20, if it land

yup the original d20's were labeled 1-10 twice, and you used a crayon to colour the on set differently. If it landed on your "blue" 10 it was a 20, if it landed on the uncoloured 10 it was 10 for example.