This version of the GN-4 has a red-coating and a decimal point on the left and was manufactured by Lorenz SEL. Like many nixie tubes, it uses a B13B socket. The digit height of 16.5mm is noticeable larger than the plug-compatible ZM1020 and other similar tubes.

Digit size 16.5mm
Min current 1.5mA
Max current 3.5mA
Base B13B

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