I knew I had seen this somewhere, but it took me a while to find it: https://mirror.thelifeofkenneth.com/lib/electronics_archive/MullardTubesSpecialProducts1972-73_text.pdf. Search for ZM1263, you will find this:
ZM1263 In line, side-viewing indication Incorporates a red filter Characters —, +, ~, * 10-5 170 140 2-5 Flying Lead ' * This is a symbol shaped like a Catherine-wheel on type ZM1263 that may be used for special indications, e.g. fault condition. On Wednesday, August 28, 2019 at 1:26:19 PM UTC-4, Bill Notfaded wrote: > > The venerable NL-5866SX... > > [image: s-l1600.jpg] > > [image: NL5866SX.jpg] > > [image: s-l1600 (1).jpg] > > [image: s-l1600 (2).jpg] > > [image: s-l1600 (3).jpg] > > [image: s-l1600 (4).jpg] > > It's really all just about the spiral though... I'm not even sure what the > symbol is for to be honest but I've rarely seen it a few times and just > happy to have a couple NOS finally. > > > Regards, > > > Bill > > > > > > > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/9021504e-cd1d-4c5f-8d26-2b194c57eeea%40googlegroups.com.
