Cat No. 194-D. c. late 1950s. 1.5x12-1/4x15" tall tin litho demonstrator is mounted to wood base at bottom left and right. Front has attached extension post holding thick looped double wire which has wooden counter weight at opposite side. Unit comes with separate 1.5" dia. metal piece. When demonstrator is plugged in, the front attachment rotates and metal piece rolls smoothly. Actual toy sold in stores was operated by hand and had no electrical parts. Scattered lt. aging and some tiny oxidation dots on metal surface, o/w bright and Fine/VF. Working. Great concept and fun to watch.