Image:NixieFrequencyCounter.jpg

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Systron-Donner frequency counter from 1973 with Nixie display - photo by E. Barbour


Public domain This file has been (or is hereby) released into the public domain by its author, E. Barbour. This applies worldwide.

In case this is not legally possible:
E. Barbour grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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current01:59, 24 June 2005460×181 (36 KB)Julo (Systron-Donner frequency counter from 1973 with Nixie display - photo by E. Barbour {{PD}})
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