Marx Busy Bridge, 1930s-1940s, USA, mechanical wind-up.
The Busy Bridge is a hallmark in the 1930s-originated line of mechanical “bridges” and “honeymoon expresses” that depicted vehicles and trains whirling through their environments (albeit in circles or ovals, endlessly repeating). This version owes much to the Brooklyn Bridge in New York, and features numerous vehicles traversing the bridge, miraculously disappearing at the end and then reappearing later. An ingenious toy even after some 80-plus years, topped only by its intricate and creative artwork captured through metal lithography.
Image is 2048 pixels wide. Image copyright Jim Bunte.