Mullard ZM1500/12 12-Digit 7-Segment Neon Pandicon Display
Indicateur numérique à 12 chiffres
Planar-PANDICON-12-Ziffern-Anzeigeröhre

It was used in the Rockwell Anita 1211 SL calculator.

Fiche technique • Data sheet • Datenblatt: ZM1500.pdf

 

85 x 25 mm • 3"3/8 x 1"

The shiny wires are actually electrodes, with the surrounding black metal being the other electrode, arranged as 7-segment displays. These operate in the same way as small neon lamps, so with an applied voltage of about 165 V, an amber-coloured discharge is generated around the energized wire electrode.

 

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