German mastering, lacquer cutting and chief engineer at [l281738] from 1964 until 1984 and then at [l266542] until 2006.

His lacquer cuts between 1964 and 1984 can be identified by always hand-etched Sc, Sc-I, Sch-I or Sch-II in the runouts, where Sch looks like J.I.L or N.I.L., and the roman numerals stand for the cutting room/lathe.
Please credit:
Lacquer Cut At - TELDEC-Studio, Hamburg
Lacquer Cut By - Klaus-Jürgen Schneider + ANV Sch
Note that there was an unknown, earlier engineer using Sc (often as Sc-S) before 1964!

His DMM cuts in Nortorf can be identified by always hand-etched Sch or Schn-N, where Sch looks like J.I.L or N.I.L.
Note that in Nortorf only DMM was done.
Please credit:
Mastered At - TELDEC Press GmbH
Direct Metal Mastering By - Klaus-Jürgen Schneider + ANV Schn

When in doubt, please ask in the runout forum.