I love glow lamps and have a lot of them -- but I've never seen an NE-1 until today. None of my literature mentions it, all the catalogs I have start with NE-2. It has a candelabra base, the envelope is a G-5.75 (23/32"), and the electrodes are a pair of thin spiral copper wires, passing through a white glass bead. Here is a picture lit; another will follow. I lit it through a 100K ohm resistor and it fired at the usual 68 volts or so. This is at about 80; it gets brighter at 120 and did not arc even at 140.
The W on it means Westinghouse. Curiously for an American glow lamp with a screw base, there is no resistor built in and I suspect the convention of putting screw bases on internally ballasted glow lamps came after this type was manufactured. Does anyone have any literature on the NE-1, especially giving a likely date?
I did find plenty of references to NE-1 on Google -- but they were all callouts in parts lists or schematics (R-1, R-2, NE-1, etc.) and not references to this lamp type.
