Portable Alethophonic gramophone, circa 1927, from Banfield & Son in the collection of the Musée des ondes Emile Berliner, Montreal. (Image courtesy MOEB)

Toronto Daily Star, January 24, 1928, p. 30

The Montreal Star, December 3, 1927, p. 26

Toronto Daily Star, April 4, 1930, p. 20. Ad for an Alethophonic tone arm and reproducer, and photo of an Alethophonic True Tone reproducer.