National Union 5Z3
NOS w/ Original Box
DUAL TRIODE TUBE
RECTIFIER TYPE TUBE
POWER VACUUM TUBE
RADIO VACUUM TUBE
GUITAR AMP TUBE
VINTAGE STOCK
Coke Bottle Shape
Clear Glass
Black Plates
Dual Support Rods
Hanging Filaments
Bottom [] Getter
Plastic Base
Label Printed on Base
TESTED NOS
MADE IN USA
DATE CODE: IC
TESTED on HICKOK TV-7
Results: 62 / 60
Minimum: 40 / 40
Combined Shipping Available! Buy any amount of Tubes in USA and pay just shipping for one! International buyers combined shipping 0-8 oz package $16 and 8-24 Oz - $26
All Tubes Tested on a Calibrated Hickok TV7 or Sencore TC136