Here it is: SEGA SJ-200 handheld Joystick.

This was the most popular joystick for SEGA SC-3000. Compact and ergonomic design, fine and very elegant. You can handle with both right and left hands and control your games as you wish. The fire buttons are easy to push by thumbs and pointer finger while with other hand you can control the lever.

A very good product, which is compatible with many 8bit systems with a 9 pin Atari like joystick socket.