LEGACY of the ANCIENTS Code Wheel
This is a Role-Playing game, developed by Quest Software and published by Electronic Arts, and released in 1987.
Like most Electronic Arts C64 disk there is copy protection on the disk, but the game also uses an off disk protection – the Code Wheel.
The game ask the player to match a gemstone (smaller top wheel) and the name of a world on which another branch of the Galactic Museum exists (the bottom wheel). Then you have to enter the six digit code from the requested RING number.
I did not have this code wheel, but thanks and credits to Moloch here it is in PDF: Legacy-Ancients-CW