New inventions are demonstrated by Geoffrey Boumphrey, the Club's technical adviser.
Organiser: Leslie Hardern - to whom specifications of the inventions should be sent, c/o BBC Television Service, [address removed]
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New inventions are demonstrated by Geoffrey Boumphrey, the Club's technical adviser.
Organiser: Leslie Hardern - to whom specifications of the inventions should be sent, c/o BBC Television Service, [address removed]