(!!!) 249B Western Electric Engraved Base NOS 1930's in 249C box (58/40)

249B Western Electric Engraved Base NOS 1930's in 249C box tests excellent

58/40

SINGLE TUBE - NOT A PAIR  

249B was 1st introduced in 1934, replaced the 249A

249B and 249C are similar to 866A RCA

Used in:

D-6656 RTE

Navy D-97502 Rectifier

14A Rectifier

99A Amplifier

100A Amplifier