Germanium point contact diodes
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Germanium point contact diodes: Six BTH CG1-C in ceramic cases in a glass bottle (1948); Westinghouse WG7C in glass case (1951); Westinghouse WG5B in glass case (1951); Westinghouse WG5A in glass case (1951); BTH CV448 in glass case (1952); GEC GEX54 in glass case (1955); BTH CG4C high hole storage (1953) (W.W.Jan 1954); Mullard OA47 with gold bonded whisker to kill hole storage (c.1958); Hughes 5007 from Glenrothes factory ( 1965); five other unknown
