There are 18 pins on the hunger .... with 18 wires ...I would guess they used jumpers between standard lit segments, and ones that should not be lit. They may have also cut leads on others to further obscure the letters.
HI.. believe me when i tell you ..those look like channel knobs from old school 1980's tv sets....but it's like they put them on top of each other. the trick is gonna be finding the exact model it came off of.View attachment 1609366
Most likely it was in the top featured photos and you clicked on the image. Those featured items are usually from threads that are years old and then people inadvertently bump old threads.Ah well good! I didn't notice the date. It popped up on my new post feed for some reason! Odd.