SESSIONS TYPE MOTOR MOVEMENT. The clock case is made of bakelite or tenite. The clock case is just stunning with the marbleized swirls of colors as you can view in the photos. The animated motion part of the clock is the merry go round rotates around the entire time the clock is running to simulate the motion of a real merry go round. There is a shiny piece behind the merry go round to give it a stunning reflective appearance. The area where the carousel is located that lights up and a light switch on the side to turn the light off or on. There is no missing parts on this clock as you so often find. All the riders and ticket taker is intact as well as the fence. TO SUM UP THE CLOCK: THE CLOCK KEEPS ACCURATE TIME, THE ANIMATED MOTION PART OF THE CAROUSEL WORKS AS IT SHOULD, THE LIGHT AND LIGHT SWITCH WORKS AND THE MOTOR IS QUIET.