Etsy seller MarsDice makes this honest D20.
The dice below were found in Bergen (Bjørgvin), and are believed to have originated from the medieval era. What sets these apart, as can be seen in the image below, is that two of the die’s faces show the number five. The die also features two sides with the number four.
So either they were intended for a game that didn’t use a 1 or 2, or somebody was trying to pull a fast one in a game of chance.
. . . so you hire your 13-year-old nephew to photograph the dice you’re selling.