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?