In a message dated 6/10/2005 5:02:25 PM Eastern Standard Time,
[log in to unmask] writes:
There would have had to be several, since the earliest pressings have matrix
numbers in the neighborhood of XLP 200 and up. As an example, ML 4057 is two
Lily Pons sets, matrix numbers XLP 312 (78 set MM 561) and XLP 228 (78 set MM
505). I have test pressings of a few of these early albums and they show the
eqivalent 78 set numbers on the labels.
It looks as if they built up a library of matrixes before deciding on the
final release numbering. The demonstration record introducing the format to
dealers has a higher matrix number (XLP 439) than most of the early issues.
PAUL SOUTHARD PRESENTS
THE COLUMBIA LONG PLAYING
LP MICROGROOVE RECORD
Recorded As Presented At
Columbia's 1948 Distributor Convention
Columbia Masterworks (XLP 439) (Blue Label)
12", 33-1/3 rpm., vinyl, microgroove, single sided, 22 minutes
A promotional disk explaining and describing the development of the LP record.
(in poor condition; scraped and scratched)