I have four (4) untested GE JG-6100 6C4WA tubes I purchased for spares back when I had a vintage Ampeg SVT. I believe they're all functional as I recall testing them when I purchased them. However, I have no way to currently verify that so you'll be buying them as-is.
They come in these ancient Hughes Aircraft boxes dated Dec. 1957 that appear to potentially be original to the tubes, though I have no way to verify that. But there's 4 identical boxes (tops/lids falling apart on some) for the 4 seemingly identical tubes.
Happy to answer whatever questions I can.
TRADE: Some cheap FX pedal, working tuners that will cleanly fit a Squier Jazz bass, Dunkin Doughnuts gift card, framed wall art, whatever else you want to offer.