MULLARD GZ32 5V4GT PAIR OF NOS BRITISH VINTAGE NEW OLD STOCK NEW IN BOX VALVES TUBES WITH MATCHING DATE CODES 

BRITISH VINTAGE MULLARD RECTIFIER VALVE WITH A WONDERFUL CLEAR WARM SOUND.

MADE IN THE MULLARD BLACKBURN FACTORY IN GREAT BRITAIN 

MULLARD BLACKBURN " B " FACTORY CODES ETCHED INTO THE GLASS OF THE BOTH OF THE VALVES

THE SAME MULLARD FACTORY DATE CODES ARE ETCHED INTO THE GLASS OF BOTH OF THE VALVES = R71 B6A

MADE IN GREAT BRITAIN IN THE 1960'S 

BLACK BASE WITH CLEAN SHINY UNUSED METAL PINS

LONG GREY ANODE PLATES

LOWER RECTANGULAR GETTERS

ORIGINAL VINTAGE MULLARD BOXES WITH VINTAGE BROWN TISSUE AND CARDBOARD WRAPPING

THIS TUBES TESTED AT 100% STRONG NOS READINGS ON MY B&K 747 + HICKOK TV-7 TUBE TESTERS

TESTED FOR  GAS AND  SHORTS

FREE PAY PAL FEES

INTERNATIONAL AIRMAIL SHIPPING - EXCEPT TO RUSSIA AND CHINA

PLEASE SEE MY EXCELLENT E BAY CUSTOMER FEEDBACK AFTER OVER 15 YEARS OF SELLING VINTAGE VALVES ON EBAY.

PLEASE SEE MY EBAY 15 YEAR SELLING AWARD IN THE PHOTOS

Philips Holland bought and owned Mullard UK and a many other valve companies in the 1920 - 1960 period.

They then branded British made Mullard tubes with their own Philips logo. 

The British Mullard engineers etched factory codes into the glass of their British made valves,so they knew the difference.

*Pope, Valvo, Adzam, Mazda, Amperex, Bugle Boy, Mullard, Miniwatt Dario, and Radiotechnique were all names owned by Philips Holland in the 1950/1960s. 

The respective names typically referred to factories.

 For instance, Mullard operated in England. 

All of these factories may at one time or another produced tubes with various other names attached. 

Which is why we see Amperex and Mullard tubes made in Holland or Philips branded tubes made in England. 

Factory codes etched onto the glass or underneath the base of the tube help us to figure this one out.

TUBE ROLLING WITH QUALITY VINTAGE VALVES IS A LOT OF FUN AND WILL PRODUCE WONDERFUL MUSICAL IMPROVEMENTS TO THE TONE OF VALVE DRIVEN AUDIO COMPONENTS 

I AM AN AUDIO MAN FROM WAY BACK AND I USE VINTAGE VALVES IN MY MODERN TUBE AMPLIFIER AND TUBE PREAMP WITH WONDERFUL RESULTS. 

VINTAGE VALVES MADE IN THE GOLDEN AGE OF AUDIO AUDIO IN THE 1950'S AND 1960'S ARE SO MUCH MORE MUSICAL SOUNDING THAN THE MODERN HARSH SOUNDING RUSSIAN AND CHINESE VALVES THAT ARE SUPPLIED AS STANDARD IN AUDIO EQUIPMENT THESE DAYS.