All I've learned.
A) The Edison Long Playing Record- Except for the Long-Playing Sample of Beethoven's Fifth Symphony, none of them were marketed emphasizing their long playing continuous capabilities. There is an interesting side note to the Long Playing picture. The first Edison Long Playing Sample record was the Beethoven Fifth Symphony. The first Victor Program transcription was the Beethoven Fifth , and in 1948 the Fifth reappeared among the first of the Columbia LP issues. I have not traced the lineage back to the first multiple disc 78 set.(1)taken from The Edison Discography (1926-29) by Raymond R. Wile page xix-xx
B)12025 (12") ABCD 1-Jan-1927
FGH 10-Mar-1927
JK ?
American symphony Orchestra (Cesare Sodero, conductor) 11340; 11341; 11350; 11351
Symphony #5- part 1 (Beethoven)
Note: 11340, 11341, 11350, and 11351 were recorded for LP transfer and never appeared as regular discs. Samples were made, at least one copy exists in a private collection. taken from The Edison Discography (1926-29) by Raymond R. Wile page 379
12026 "states same with different matrix #'s shown"
C)This copy was purchased from an estate sale of a collector that was acknowledged in "The Edison Disc Phonographs and the Diamond Discs by George L. Frow" and a contributor to "Edison Blue Amberol Recordings 1912-1914 by Ronald Dethlefson". The edges are rough, leading me to believe it was a sample record of the 40 minute variety. I do not have a LP reproducer, and even if I did, probably wouldn't trust myself not to damage it.
