Okay, well, you don't have to be so mean about it.
Of course we also an ad for Anderson & Hedwall, which seems to have confounded prior blog attempts to identify it. Applying the best of both my google and legal fu, I can tell you they got sued. A workman's comp decision from 1940 says that some guy who was an "electrotyper" got a hernia, so I'm guess that means it was a print shop. Take that blogosphere!