82nd Airborne Division 3rd Brigade Army Challenge Coin
This coin is approximately 1 1/2 inches in diameter.
Neither of these coins are a fake, one is the original and the other is replica made for a unit reunion around 2015.
The original is the oldest known 82nd Airborne challenge coin made during the Vietnam War era.
The reunion coin may be identified by a serial number, and other small differences noted in the die-cast/pictures.