I did send the Blech information formatted with columns, but it didn't come out that way. The B2033x numbers are single side numbers, the as and az numbers are matrix numbers, and the 6969x and 6593x number are issue numbers. Jon Samuels On Friday, October 11, 2013 12:38 AM, Jon Samuels <[log in to unmask]> wrote: Dear Takeshi-san, Here's the Leo Blech information you asked for Dear Takeshi-san, Here's the Leo Blech information you asked for: recorded 1924 - GERMAN OPERA HOUSE ORCHESTRA, CHARLOTTENBURG (BERLIN) s/s #matrixissue #s B20336 523az 1812 Overture, Op. 49 (Tchaikovsky), Side 1 69692 65931 B20337 524az 1812 Overture, Op. 49 (Tchaikovsky), Side 2 69692 65931 B20338 525az 1812 Overture, Op. 49 (Tchaikovsky), Side 3 69693 65932 B20339 1657as 1812 Overture, Op. 49 (Tchaikovsky), Side 4 69692 65932 Jon Samuels On Friday, October 11, 2013 12:12 AM, Takeshi Hasegawa <[log in to unmask]> wrote: Dear All, I have one piece of "1812" by Tchaikovsky performed by Charlottenburg German Opera House Orchestra under Dr. Leo Blech. The record originally consists of two pieces (four sides), and it was made in the acoustic era. http://www.youtube.com/watch?v=cKu3L0uCqxA I have looked for related information on the web, but no info is found. I would be happy, if you would kindly provide me with some info of the recording. Thank you in advance. Takeshi, Kyoto, Japan