No ring turns alone.
The outer die moves the middle; the middle moves the inner; the inner returns the outer.

Three engraved rings share a hidden gear train. Bring every northern marker home to reveal the central master seal.
Enter the die chamberEach ring advances itself and one linked ring by a quarter-turn. Align all three arrows with the fixed northern index.
The outer die moves the middle; the middle moves the inner; the inner returns the outer.
Book engraving, lapis enamel and foil-like edges shape the observatory press.
No prediction, gambling, money, prize or monetary reward is associated with play.