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Germanium point contact diodes type GEX34 and GEX54

Germanium point contact diodes type GEX34 and GEX54

circa 1950
crystal valve type GEX54

crystal valve type GEX54

circa 1950
Medium power silicon junction diode

Medium power silicon junction diode

circa 1950
diode

diode

circa 1950
Silicon junction diode type SX640

Silicon junction diode type SX640

circa 1950
Germanium crystal GEX44

Germanium crystal GEX44

circa 1950
Medium power germanium junction diode type EW54

Medium power germanium junction diode type EW54

circa 1950
Point contact germanium triode type EW51

Point contact germanium triode type EW51

circa 1950
Germanium Junction Diode type EW ??

Germanium Junction Diode type EW ??

circa 1950
Two unmarked packs of 5 pre-production Germanium Junction Diode semi-conductors, c.1950

Germanium Junction Diode

circa 1950