Sorry I had a difficult time getting the light to pass through this one - oh wait, these don't pass light!! While visiting Albuquerque last weekend for the Enchanted Insulator club Annual show, I found this in a small antique store.

I know nothing about these - anyone got an ideal as to what "U" number, mfg, and value??

It's been identified U-351 and the value was quoted as "zip" - still fun to find things for a few bucks!!

Thanks Pat & Richard