(!!!) (BEST SINGLE – RARE) CX-330 Cunningham balloon engraved base NOS 1920”s (3.0ma)

CX-330 Cunningham balloon engraved base NOS 1920”s – box in very good condition

3.0ma
Gm-800

NOS Ma = 3ma
NOS Gm = 800-900

(ST12 or T9 bulb shape on UX-4 base, Vfil=2V @ 60ma, Mu=9.3, Variant=1230)
(VT-67=30 Special)

– LINCOLN DC SW-33 radio 1933