Appears to be a typical 35mm "toy" or home projector that could range anywhere from the 1900's to the 1930's.
Take a bit of scrap 35mm film and see if the sprocket teeth on the roller line up with perforations of the film. Since modern still film is perforated with KS perforations, the fit will be very loose, as perforations of this period were BH perforations; barrel shaped with rounded corners.
There were other gauges of film in this time period, but I expect it to be 35mm (hence the test). Some home movie gauges were 17.5, 22 and 28mm film, but the sprocket profile on this machine suggests 35mm.
Open the film gate and swing the lens to the side: does it have claws that oscillate on each side of the aperture when the crank is turned? If it does not, and a square bracket rotates under the projection aperture, then it is a "beater" movement and probably closer to 1900 than 1930.
Look in the lamp house: does it have an oil lamp or an electric socket?
The projector appears to have been modified; those rails that extend outward in front do not appear to be original. Someone probably modified it to take a larger reel of film, as these were intended to take 10 to 100 feet of film maximum for home use.
From the look and the build, I would place it between 1910 and 1915 or so...