In a message dated 5/4/2011 10:25:07 A.M. Eastern Daylight Time,
[log in to unmask] writes:
OK, I'm slow, what is "VTM"?
When were the first Columbia discs produced?
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all of these details are covered in PHP, including the changing material of
the Berliner discs and the VTM as Victor Talking Machine (Co). and the
first Columbia/Burt/ Climax paperless label discs.
The founder of Duranoid, and an early patent of his, played a role in
the overturning of Ademor Petit's 2-sided "innovation".
allen
_www.phonobooks.com_ (http://www.phonobooks.com)
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