Thanks, Mike, for sharing the diameter locator information, which did
indeed reach all the way back to Brunswick. As for the "P", I have seen
matrices so marked that were recorded in-house and not for clients, so some
fudging may have crept in. In the Lp era, the client matrices were
identified as [x]tv.
On Sat, Nov 9, 2019 at 1:42 PM Michael Biel <[log in to unmask]> wrote:
> Dennis— The XP NEVER meant experimental. The X ALWAYS was the indicator
> for 12-inch dating back to Brunswick and ARC days. (Y is 16-inch
> indicator.) The P started with the Personal series and extended into the
> Client Labels and outside supplied recordings.
> Michael Biel
> Get Outlook for iOS<https://aka.ms/o0ukef>
> From: Association for Recorded Sound Discussion List <
> [log in to unmask]> on behalf of Dennis Rooney <
> [log in to unmask]>
> Sent: Saturday, November 9, 2019 1:30:07 PM
> To: [log in to unmask] <[log in to unmask]>
> Subject: Re: [ARSCLIST] Heart murmur record set
> 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!
> 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 with any discographic info on it and the liner notes do not quote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
> 1006 Langer Way
> Delray Beach, FL 33483
1006 Langer Way
Delray Beach, FL 33483