When the NES2 was released in 1993, designed to resemble the SNES, the controller was redesigned to resemble the SNES controller while retaining the palette of the original. Its "dog bone" shape was notably different from the simple rectangular shape of the original. Also the A and B buttons were diagonal instead of straight across like on the original controller.
The NES controller is the most widely-known controller in Nintendo history. It has appeared in subsequent media along with Nintendo merchandise and even future games. The Wii Remote acts as an NES controller substitute for all NES Virtual Console titles. In Captain N: The Game Master, the NES controller appeared as Kevin Keene's Power Pad, which he could use to move fast, jump to high heights, and even freeze the action around him (strangely, he was always shown pressing the Select button to pause things instead of the Start button).
MODEL NO: NES-004