The Odeon-Streich-Orchester was conducted by Eduard Künneke, the Beethoven No. 5 was recorded in August 1911 and No. 6 in November & December 1911. The latter can be heard through the British Library site https://sounds.bl.uk/Classical-music/Beethoven/026M-1CL0006551XX-0100V0 [Europe only I think can hear this] The 5th was only ever issued in Germany the 6th was issued both Germany and the UK I believe.
Italian Wikipedia has a entry for him here https://it.wikipedia.org/wiki/Eduard_K%C3%BCnneke