How to tell if a CRT is rebuilt?

[n2bew]

This is a complete neewbie question, but here goes.

I am wondering if the CRT on my Sylvania Halolight is rebuilt.
I found a label on the bottom of it (see attached picture, sorry one is upside down but you can read it better) that says near the end, "This tube employs a used glass envelope". It could be my naivete but since it says "used" refering to the tube on the label would that have been put on after it was rebuilt?
I did look up how it was done and see the neck is cut off in the process and a new gun installed with the neck re-conneced. There is an area with a slight ripple feel to it on the neck that could be the seam from this, but I am not sure. It is hard too see in a picture, easier to feel, but I attached a picture of the neck too.
Or am I completly in left field? There is no makers mark on the plastic end of the tube either. Just the tube size on a label on the side, also included in the attached pictures.
Thanks.
Tom