MARCONI 100A KEY



 
 
key_type100.jpg
Type 100A (G. 5033) Type 100A. (Photo courtesy Museum of the History of Science)


Contributors and Credits:
 

1) Type 100 key photo   http://www.mhs.ox.ac.uk/collections/search/displayrecord/?invnumber=24429
 
 

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Nov 15/12