GZ32 Mullard Holy Grail black plate ful getter 1950s made code on glass 1653 52KU 5AQ4 pair tested 100%

Description

The GZ32 is a medium power indirectly heated full wave rectifier for all use both in audio amplification and radio.

The early GZ32 made by Philips Mullard have numbers on glass with special glass treatment, usually cup or full getter, but also square and round getter 

Pair of very early Mullard GZ32 with full getter and etched code on glass 1683

Holy grail and the best Mullard GZ32 ever made

Black plate with holed plate where filament can be seen through.

Excellent with all vintage and modern amplifiers

Tested with AVO VCM 163

Each valve tested 100% with A1=A2 100% balanced