Paul:
ACS was, I believe, the initials for Alexander Coppel Stahlwaren.
In 1936, the two Coppel brothers, Carl Gustav and Dr Alexander, were forced out of the company and only the non-Jewish Karl Reiche was allowed to stay as a partner in the new company. This allowed the NS party to buy from ACS.
In 1941, the name was changed to Alcoso Werk Stahlwaren, or AWS.
This info came out of the Fisher Quick reference Guide.
John
