You can find the serial number on a Dan Wesson pistol on the frame between the take down lever and the trigger guard, on the right side of the gun with respect to the position of the gun when gripped. The company typically etches the serial number into a flat surface on the metal frame, according to images available on the manufacturer's website.
On a Dan Wesson revolver, the serial number is also on the gun's frame, located between the trigger guard and the cylinder. Most Dan Wesson firearms have a label either on the frame or on the barrel so that it is easy to identify that they are authentic Dan Wesson guns. Firearms in general often include a label indicating what kind of ammunition to load them with and their make, model and manufacture date, notes the International Hunter Education Association.
Dan Wesson Firearms is a U.S. subsidiary of a Czech firearm manufacturing company known as CZ-USA. The company headquarters are in Kansas City, Kansas, and its manufacturing plant is in Norwich, New York, as of August 2015. Daniel Wesson founded Dan Wesson Firearms in 1968. He was the great-grandson Daniel B. Wesson, of one of the original founders of Smith & Wesson, as reported by Wikipedia.