I just scanned this whole thread - 22 pages - yikes!
I only saw one wrench of this Duro-Chrome Streamlined Dart style pictured, by Ryan. That seems to me to add credence to Alloy-Artifacts' info that they were made only in 1942-45, and therefor pretty rare.
War production, cadmium plated. I ran across this info while researching something else and the distinctive design stuck in my head. Then, last week I stumbled across this 9/16 digging through the boneyard at a flea market, and grabbed it! Considering the load I got for a tenner, this guy cost me less than a dollar.
Anyone care to chime in as to AA's dating? It's my only source so far (haven't checked ToolArchives yet) , but I'd be interested in confirmation/refutation.