Don,
It was published by Western Supply in Las Vegas. The stampbox says "Made in Italy by Kina Italia, Milan KLV-35".

It says "Exciting Las Vegas" across the top of the back, and there's an area marked off "Do not write below this line". That makes me think it might be a "retro" card...published after the pictured casinos were closed.

"Looking east along Convention Center Drive. The lifelike mural of the Paddle Wheel Hotel-Casino splashes into the night. The tower of the Landmark Hotel and Casino across the street offers its visitors spectacular vistas of the dazzling lights of the Las Vegas Strip."
Photo by Gunnar Kullenberg