What is my XYZ worth? How much is THIS worth? Value my...

Is that a 531 model or gas pipe?
It's tru-wel, which was, I believe, a TI/Raleigh/Carlton proprietary tubing. Unfortunately, I know nothing else about it, other than it's not quite as light as 531. I'm not sure it quite falls into the gas-pipe category, but is it that bad?