How can you distinguish an original wahl hair clipper from a fake one?

the original wahl is actually heavier than the fake wahl and the original is more expensive than the fake so you got to check the price.

The motor is much stronger on the original clipper. If the moving blade is held between the thumb and index finger and pressure is applied the original clipper will continue to vibrate the blade. The fake clipper blades can stop and thus pull out hair. Ok on a human who will tell you but dogs bite! The Wahl Super Taper (TM) is the number one selling clipper in the world and that is why it is faked.

Take the lid off by removing the three screws and look at the piece of metal coming down on the right side. That is called the pace arm. Look for an indentation like a ] with a part of the copper coil that sticks out to fit in the ]. It is near the top and quite evident.