Boettcher, Wolfgang. (1935–2021) & Koch, Lother. (1935–2003) & Schwalbé, Michel. (1919–2012) & Ueberschaer, Siegbert. (1930–2011) & Zöller, Karlheinz. (1928–2005) "Soloists of the Berlin Philharmonic" - Signed ProgramSigned single sheet program from a performance by the "Soloists of the Berlin Philharmonic" on May 2, 1972 as part of the Festival Internacional de Santander. The program listing has been signed by all five members of the group; flautist Karlheinz Zoller, oboist Lothar Koch, violinist Michel Schwalb (who appears to have made a copy editing adjustment to his printed name), violist Siegbert Ueberschaer, and cellist Wolfgang Boettcher. The performance