| 
         ZM1551 (Valvo)
        Neon Discharge Display  | 
    
Planar neon gas discharge readout similar to Sperry/Beckman/Babcock 
'Panaplex'.
These are very rare displays.




They came along with the complementary ZM1550 in the box:

This picture only shows the colour of that display. It is 
taken from a Sperry- display.

| Röhrendaten/ Tube Data | |||
| German | English | ||
| Typ | Type | ZM1551 | |
| Hersteller | Brand | Valvo | |
| Vergleichstypen | Substitudes | - | |
| Symbole | Displayed Symbols | 1½-Digit, 7 segment, 2xPR, +, - | |
| Symbolhöhe | Symbol Height | 14mm (0.55") | |
| Abmessungen | Dimensions | 23mm (0.9") X 35mm (1.38") X 4mm (0.157") thick | |
| min. Betriebsspannung | min. Supply Voltage | V | 160 | 
| typ. Brennspannung | typ. maintaining Voltage | V | 135 | 
| 
    Betriebs- Kathodenstrom  | 
    
    Typical Cahthode Current  | 
    mA | 180µA, (Deciaml point: 13µA) | 
| Sockel | Base | Pins, special arrangement | |
| Fassung | Socket | 
    keine Fassung erf./ no socket needed  | 
  |
Pinout:

Ansicht von vorne / View from front!
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