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Museum pieces: Osram L30

L30 Made by Osram for the General Electric Company Ltd. of England

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Originally made in 1938, this mint tube is the actual sample supplied to the BBC research department on 30th June 1939.

 

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The L30 was approved 19th July 1939 and given the serial number 482202.  Here are the test results;

 

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We still have the orignal blue and gold box, which is in good condition despite its' age.

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