I believe that the 927-8A was pre-Sparkomatic. To answer your question, Sparkomatic was the company that bought/licensed the Altec name back in the 80's--speakers from that era (including the "Altec" computer speakers etc. that are still being manufactured today) aren't "real" Altecs, they are Sparkomatic speakers with the Altec name.....
Here's a little info on your 927-8A's
Altec Thiele-Small Parameters