That's a very early pointing device.
Inner wheel = horizontal axis
Outer wheel = vertical axis
For a long time, etch-a-sketch skills translated very well to the world of computing.
dude, stop givin out this info in public.
fyi hit me up on the premium grp when u get a minute, got a question about my conversions
http://www.wickedfire.com/groups/wickedfire-premium-members.html