From the Stanley Motor Carriage Company, operating from 1902 to 1924. They went bust after their steam cars couldn’t compete with advancing internal combustion engine technology. A key development in their the demise was the electric starter, which eliminated the risk of injury from a crank start.
Photo of a 1908 car, same vintage as the ad, but this model has a covered top to keep out the rain and sun.
Six horsepower engine from a Stanley Steamer,
And the steam generator from a 1919 model,
You stream cars are always water limited. Water is heavy!
But water is (usually) easier to find and refill than gas, especially in those early days.