This came from an old magician’s estate purchase.
How this was used is not know to us.
Maybe you are familiar with this prop.
By holding the prop between your two hands and tilting it slightly back and forth you create a multi-colored (hypnotic) moving lights effect.
If the prop is turned 90 degrees the moving lights are no longer visible.
When the back side of the prop is shown to the audience it reads “Made in Russia” but with “R” in Russia is reversed.