I had been planning to do this one for a while and finally decided to do it this evening, though I got to it in waning light. It’s on the west side of North Magnolia Avenue, just north of Michigan in front of the Spanish Seventh-Day Adventist Church.
Based on viewing it in better light I believe the year is 1950, which would make it roughly contemporary with (and possibly related to) the building of the church. I am not completely sure about the name. It’s certainly “Gordon” but the first initial could be B or E. In some light it looks more like B.
I haven’t had any luck finding out anything about the contractor. I thought I had a lead when I found some 1920s advertisements for the Brown-Gordon Co., but they were advertising delivery of gravel and sand. They show u p again in the October 1, 1955 State Highway Department publication, Compilation of Design and Construction Data for Concrete Pavement on the State Trunkline System. The date was promising, and I was hoping this would reveal them to also be concrete contractors, but no, they are listed only under “Fine Aggregate” and “Course Aggregate.” I suppose it is just a red herring after all.