The CPJ1311 Series joystick is very similar to the ‘analog’ joysticks on PS2 (PlayStation 2) controllers.
It is a self-centering spring loaded joystick, meaning when you release the joystick it will center itself. It also contains a comfortable cup-type cap which gives the feel of a thumb-stick.
The 60B means linear angle 60°,the more bigger of digital value,the more wide of the stick;103A is 10K resistance,
The goal of the joystick is to communicate motion in 2D (2-axis) . This is achieved by housing two independent 10K potentiometers (one per axis). These potentiometers are used as dual adjustable voltage dividers, providing 2-Axis analog input in a control stick form.
The potentiometers are the two blue boxes on the sides of the joystick. If you move the joystick while watching the center shaft of each potentiometer, you’ll see that each of the potentiometers pick up movement in only one direction.