I've been off site for a while. GumboStu's citations (look for them in the label bio for Special Editions) are scholarly and convincing. The 1948 date is probably correct and the objections I raised in April are withdrawn. The Special Editions were a short-lived series, perhaps as few as 17 issues. I might speculate that they were the true last gasp of the ARC, but then somebody might have to correct me again,,,
I found this while looking for info on 5013-S (Bix Beiderbecke's Margie):
"The American Record Corporation name was revived by Columbia in May 1948 by issuing the Special Editions series, a set of recordings for the record collectors market ... The producer was George Avakian, Columbia's collector specialist, who had previously produced the 'Hot Jazz Classics' albums."
I put the references in the label bio
There can't be any doubting the nature of the Special Editions label as a re-issue of Columbia material. I would think, however, that if the label dated to 1948 the label would bear the name of Columbia Records, which had been revived in 1938 after CBS's purchase of ARC and was by 1948 a booming, independent concern. The American Record Corp. was a decade gone by then and was never to be heard from again. It's last products, the Conqueror and Melotone labels were discontinued immediately upon completion of the CBS deal.
The -S suffix is typical of those used during the 1920's and early 1930's on Columbia series and Columbia subsidiaries (Velvet Tone, Harmony, Diva, Clarion), but could be a deliberate throwback to the time when the re-issued recordings originated. Perhaps someone who has a better library than I have immediately at hand can address this. There has been quite a lot of encyclopedic information on Columbia records published in recent years.