1st Model Cinematograph, ca 1895, with the serial number 273 engraved on the inside.
Auguste and Louis Lumiere are credited with the world's first public film screening on December 28, 1895. The showing of approximately ten short films lasting only twenty minutes in total was held in the basement lounge of the Grand Cafe on the Boulevard des Capucines in Paris and would be the very first public demonstration of their device that they called the Cinematograph, which effectively functioned as camera, projector and printer all in one.
An example of this machine is in the Turin Museum.