This is a not often seen, Atari Hall Effect Joystick, which has been tested working. This version is what came on I, Robot, but may also work on games like Indiana Jones, Roadrunner, Escape from the Planet of The Robot Monsters, etc. Very hard to find these and can't be mimicked by other types of joysticks. This model is also known as Version A, part number A040935-01 A. Note that it does show some scuffing on the ball top.
This is old, and not rebuilt, and comes AS-IS. I cannot control what happens to the products after they leaves me. Buyer pays shipping.
COMES AS PICTURED IN LISTING PHOTOS.