Hi. Welcome. My first thought is "not substantial worth".
But you have an Akro oxblood at the top of this picture. And I'm curious about the marble to the right of the oxblood.
Interesting. I could see CAC possibilities. The white is not as solid-looking as I would expect for CAC, making me hold back. But I wouldn't be surprised if it was.
Very similar one(s) here. Not exact same size. Maybe they would welcome a pic of one with your dimensions.
CD 315-334 (Umbrella type high tension - One pice) (allinsulators.com)