Talk about useful and fun all at once! This great vintage lenticular VariVue flicker winky ruler measures a full 12 inches long inches and flips between metric and USA calculations. And, it also shows each US fractional measurement and it's decimal equivalent. For example:
1/32 = 0.03125
When you move the ruler a bit, you'll also see the metric equivalent. In this case:
These rulers are in excellent condition for their age (probably 20-35 years old). There is some wear and the backs of some of them have wayward pencil and/or pen marks.
Two rulers are illustrated so that you can see the fun functionality.