[Arran]

 I have a gassy balloon type 24 (or 224) that produces a nice glow like that, not to mention pegging the meter on the tube tester. Since it was supposed to be a good testing tube when I bought it, along with a #47, the seller sent me a refund. With regard to reactivating the getter I think that you would have to use an induction heater since that's what they used originally. For all the glory of globe style tubes you seem to run into more gassy ones then with ST style tubes, not that ST style tubes are immune of course.
Regards
Arran