Contemporary Battery-Powered 4-Cylinder Driveshaft Demonstrator Model theater lighting Bold red and black printed

Bold red and black printed quarantine notice reading "INFANTILE PARALYSIS KEEP OUT

This crack does not interfere with display of the sign

Shows expected age wear including patination

geometric belt

The glass panels show natural marbling and variation in tone

Contemporary Battery-Powered 4-Cylinder Driveshaft Demonstrator Model theater lighting Bold red and black printedBattery powered mechanical demonstrator model illustrating the operation of a four cylinder engine and driveshaft system. Constructed primarily from finished hardwood, the piece features four simulated cylinder blocks with reciprocating pistons connected via rods to a central crankshaft. As the unit runs, the pistons move in sequence, transferring motion through the crank to demonstrate rotational output. A compact motor housing with a small toggle