I hit a stroke of luck. Many years ago I had a McCulloch Pro Mac 10-10. But it hadn't been started for at least 10 years. I cleaned it up, put some fresh gas in the tank .... it popped on the second pull ..... started on the third pull. I couldn't believe it. Now I have a saw to continue my hoarding.
I am 30 miles east of Cheyenne near the little town of Carpenter. The picture was taken from the back deck of the house facing west towards the Rockies.
Gotcha. Did a bunch of steel for a resort about 30 miles out of Laramie, looking east would've looked like your pic.
Very popular model,starting with the first version in 1967 & ending in 1982 or so,this 54cc lightweight powerhouse sold almost a million units & can pull a 24" bar/chain buried all day long.After that it was changed to the Pro Mac 10-10S,displacement was increased to 57cc.I have one from '74-77 its called 10-10-Automatic ,when chainbrakes were new & standard on every model.