(!) 5U4G Sylvania rebranded Motorola used/good 1951 (48/40 and 52/40)
$ 39.99
5U4G Sylvania rebranded Motorola used/good 1951 in WB very small hairline crack in base
48/40
52/40
See more: vacuum tube
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 5U4G Sylvania rebranded Motorola used/good 1951 (48/40 and 52/40)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_7a98294d-feec-408f-9e97-c0a6a93fe373.jpg?v=1671687259){kind=link}
 5U4G Sylvania rebranded Motorola used/good 1951 (48/40 and 52/40) "Pin It")