4 Pin EF Johnson (123-209-200) NOS for 811A / 572B / 866A (1 in stock)
$ 39.99
4 Pin EF Johnson NOS ceramic bayonet socket (123-209-200) with (2.8" wide base) for 3B28, C3J, 8020, 811A, 812A, 866A, 572B
0) nickel collar
1) aluminum collar
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 NOS for 811A / 572B / 866A (1 in stock)&Category=sockets&ImageURL=http://tubeworldexpress.com/cdn/shop/products/123209200a.jpg?v=1571438877){kind=link}
 NOS for 811A / 572B / 866A (1 in stock) "Pin It")