AMG did this wheel in both 'AMG' and '///AMG' logo...the later slash logo was introduced 1992 and was also pre-MB union.
Contrary to popular belief, '///AMG' items were made for the w126 and w124 etc.....i have a brochure of these at home...see below.
AMG Aero I wheels shuold have a machine polished lip...they should be powder coated and powder lacquered. Beware of cheap refurbs on ebay that have hand polished lips and non powder lacquered finishes. Below is a picture of what an Aero I wheel should look like properly refurbed.
Also note that the centre caps are near impossible to source on the early Aero I's...they are 50mm metal pieces held in by retainers from the rear side of the wheel. The later '///AMG' logo'd wheels take a standard 70mm MB cap.
The Aero I's were produced by AGG, at least that's what I've noticed on the back of every set I've handled. I think they were absorbed into another company during the 80's. This could have been ATS who produced the Penta for AMG but I could be wrong on that.
I think Talbir will have a bit more info on these.