(!!) 5R4GYB RCA rebranded Raytheon NOS 1960's (50/40 and 53/40)
By Tube World
$ 25.99
5R4GYB RCA rebranded Raytheon NOS 1960's
50/40
53/40
See more: vacuum tube
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 5R4GYB RCA rebranded Raytheon NOS 1960's (50/40 and 53/40)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_fb723e21-f7f1-442b-a466-39b99462225c.jpg?v=1646236790){kind=link}
 5R4GYB RCA rebranded Raytheon NOS 1960's (50/40 and 53/40) "Pin It")