Picked up a short 5U4G tube the other day--anyone ever seen one like this?

EastPoint

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I picked up this cute stubby little Tung-Sol 5U4G rectifier tube the other day. It is substantially shorter than a normal 5U4G, and I've never seen 5U4G tubes really vary in size, except the extremely fancy ones from overseas. This is way shorter than a normal one, and has dual getters, which I also haven't seen on normal US 5U4G tubes. I know there are 5U4GB variants, but I'm talking 5U4G tubes here. Anyone ever seen one of these?

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Yes, knew it was a Tung-Sol as soon as I read the title. They made a few others in that stubby shouldered bottle...
 
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