Inigo wrote: Fri Nov 18, 2022 2:00 pm
Then, what does this mean in a National Gr. Co. advert in New York in December 1898?
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I presume that the "December 1898" date forms the crux of your question. As I wrote earlier, "Zonophone" was an experimental marketing term used by Seaman rather early on. In February 1898, Seaman had formed the Universal Talking Machine Company in preparation to supply a less-expensive Gramophone to be marketed under the Berliner auspices. By December 1898, Seaman was probably suspecting that the Berliner group was not going to honor the stipulation in his contract that allowed him to supply less-expensive machines of equal or greater quality. Despite this, throughout 1899 Seaman continued to submit prototypes to Berliner, followed by their rejection. Whether he was marketing Berliner's machine or a different design, it appears that Seaman had settled on the term "Zonophone" as being an effective name. As we all know, Seaman eventually (1900) marketed an entirely new machine which was indeed named the Zonophone.
If you own
The Talking Machine Compendium or
Discovering Antique Phonographs, this is explained there in detail. I have also written about it - in even more detail - in the APS magazine.
George P.