NOTE：How to identify if it is Gen3？Note that a cathode sensitivity >1800 indicates it is Gen3. Using Argue corgi optics, Argus BNVD 1431 housing, Tube was showing on the picture which is Autogated & ABC One of tube is Fom1800~, another one is Fom2000~ comes with everything on the picture only use a few times. Works perfectly. Feel free to ask me any questions.
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