Stamped matr# on runouts: 020029-1 resp. 023339 I
Also:
Side A: Fu-Se: Laquer cut by Edgar Fuhrhop & Alexander Seeland
Side B: O.-L.: Laquer cut by Hansgeorg Otto & Walter Labenski
It is a weird combination for sure, since the A side label (E 1688) features only the second part (2. Teil) of the Walzer song, and claims that the 1st part is on the flip side.