I have a VT100 with a green tube. It came to me like
that, and the screen burn is consistent with a lot of use. It's a fairly slow
persistence tube, and the bottom edge is burned with a one inch vertical line in the
middle, from that bright flash that a VT100 makes at poweroff. It's mostly hidden
under the bezel.
It could very well have been original, but it could also have been replaced at some time.
Did you get that from me? I have a hazy thought of seeing a VT100oid
in green, but I did not want to speak up unless certain.
--
Will