Z729

EF86, 6267

La Radiotechinque

Branded Marconi

Z729

M-O Valve Co. Ltd

Branded Emitron

EF86, 6267

Philips

Branded Rogers

EF86

RFT

Branded Telefunken

Z729, EF86

Branded Marconi

EF86

Branded Mullard

EF86

Branded RFT

EF86

Branded Telefunken

6267, EF86, 8Y5

Branded Amperex

EF86, 9R1

Branded Mullard

Z729

Branded Genalex