Condition: New never used NOS (new old stock). Taken from a sealed factory box

100% Guaranteed to be working, I test every tube before mailing.

Check the picture for the appearance: most are tinted to a various degree, few are transparent. 

These tubes were manufactured in the early 1990s, just before the production was discontinued

Size: 4x25mm

Strike voltage:     ~ 90V

Sustain voltage (0.2mA): 55V