I think so, they must be some experimental lab samples, I have never seen these in more than ten years. Jens

On 2018-10-24 4:26 a.m., John Snow wrote:
Interesting. Different phosphor coatings?

On Tuesday, 23 October 2018 17:24:50 UTC+1, Jens Boos wrote:

    Hey folks,

    Have you seen these VFD tubes on Ebay?
    http://www.ebay.com/itm/223200328320
    <http://www.ebay.com/itm/223200328320>

    It looks like a quite rare find, I have never seen those before.

    Best wishes
    Jens



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