i work with Edison cylinder recordings, i just bought a group of cylinders and related Edison equipment. in the box was a disc labeled :
UNIVERSAL D61B
CONSTANT VELOCITY
FREQUENCY RECORD
INSIDE START, 78 RPM, DATED 1939
UNIVERSAL MICROPHONE COMPANY
INGLEWOOD, CA.
i have no idea how this wound up in a box of Edison cylinders, but i thought it might be of interest to someone on the forum. here is a quick video of the a/b sides...
Benjamin
universal D61B frequency record
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