5Z3 tube Fivre Italy power rectifier tubes black long plate silver foil getter

one tube 5z3 Fivre  tested on tube tester Funke W19S =95mA & 80mA  (reference good at 80mA & 80mA) 

ONE TUBE TYPE 5Z3 FIVRE MADE IN ITALY 

OLDEST PRODUCTION

LONG BLACK SMOOTH RUGGED PLATE 

HANGING FILAMENT

PAN GETTER 

BLACK BASE

OLD LABELS RED AND YELLOW

box 158