Several years ago we were in an antique shop in Las Vegas. Found some dice from the Town House in Elko, and had to buy them because we'd never seen anything like them. Kept looking at them...not only did the 2 opposite sides not add up to 7; the two opposite sides were identical!

A few days ago Jim Follis showed some pictures of gaffed dice, and I've been looking for these scans ever since...turns out I was looking on the wrong computers

But I finally found them

These are in front of a mirror, so you can see both sides at the same time...

Remember...the two opposite sides are identical, so by seeing the 3 sides on each die you're seeing all 3 of the numbers that are on each die