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Thanks to everyone who dialed in.
Good to know about the LP, too.
Malcolm

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On 11/9/2019 8:30 AM, Dennis Rooney wrote:
> Dr. George D. Geckeler produced this set. It was released in 1949. The XP
> matrix numbers often mean "experimental". It was also issued on a Columbia
> Lp in the same year as ML 4240. I own the 78s myself and they seem to have
> originated on lacquer discs that were dubbed to produced the commercial
> masters. An examination of the matrix cards at Sony Archives might supply
> more information but that's all I can contribute. Nice gift idea!
>
> DDR
>
> On Sat, Nov 9, 2019 at 1:13 PM Malcolm <[log in to unmask]> wrote:
>
>> A while back I bought a seven record 12", single sided, Columbia 78 set
>> entitled "Stethoscopic Heart Records", Co M-600, which I mean to give to
>> a cardiologist friend for Christmas. I have not been able to come up
>> with any discographic info on it and the liner notes do not quote
>> recording dates, a release date, recording location(s) or even a price
>> for the set.
>> The matrix numbers are XP 29125, XP 29126,  XP 29520, XP 29908, XP
>> 29909, XP 29978 and XP 30060.
>> Help will be gratefully accepted from those who delves into this sort of
>> esoterica. It's outside my normal lines of inquiry.
>> Thanks,
>> Malcolm Rockwell
>>
>