Congrats to Jerry for the first to answer correctly this question…
“This GM accessory was offered from 1951 to 1958. What is it and what was it’s purpose?”
It’s a TRAFFIC LIGHT VIEWER!
This optically clear prism viewer is mounted on the dashboard and permits the driver to see overhead traffic lights when blocked by the car roof. Available as a Chevrolet accessory from 1951 through 1958, this item’s styling is pure ’50s.
Jerry will get his choice of one item from the Prize Closet. I just recently added a new item to the Prize Closet since we didn’t have a winner last month.