Made by Philpis and Amperex.
The lastest of metal base version. Six holes on plate. Double D-Getter.
Excellent rectifier tube.
They maybe marked as Mullard, Philips, Amperex... but all of them made in Holland.
Nos in box. .
This is Double D-Getter version. Plate are same as the version 2 of metal base type.
Better than Double O-Getter version.
They maybe marked as Mullard, Philips, Amperex, Telefunken, Siemens, Valvo, IEC,... but all of them made in Holland by Philips (early 1960s).
Nos in original box. Matched pair are available.