It is a light fixture. This light is one of many
and it's purpose is to aid mechanical eyes.
The mechanical eyes "never blink", often to the delight of the watchers watching the watched.
AA
Here's the next challenge.
This is a watch dial.To solve this challenge you will have to answer two questions. What is this type of dial called? On what kind of watch would you expect to see this type of dial?
My grandfather was a train conductor. He started with the CPR in the 1930s. He had a watch like this. Is is a "Bunn Special?". I've seen two. One has a 21 jewel movement with 60 hour dial. Another was 23 jewels. This watch can be used as a pocket watch or it can be clipped to a vest.