Osglim neon lamp, BC fitting "Not to be burnt without series resistance 2270 ohom".. Externally silvered except fort frosted rectangle. Prov. Patent 15269. British Televison Supplies Limited. Telelux Television Neon Lamp
Neon lamp from the Baird "Disc Model" television receiver, by John Logie Baird, United Kingdom, 1930 Neon lamp from the Baird Televisor 1930