4 Pin EF Johnson (123-209-200) NOS for 811A / 572B / 866A (1 in stock) Title: EF JOHNSON 123-209-200

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