In the for what it's worth category, the explanation for the Satin Blue finish (also known as the funky finish) goes like this----possibly an "Old wive's tale", but with elements of truth: The polishers are regarded as the most skilled of all the production employees---and it takes a loooooooooooong time to develop those skills. Skilled employees are in short supply following WWII. What to do?!!
Develop a finishing process which does not require polishing, and use it until such time as the neophyte polishing folks get up to speed. Right about here is where I start running my mouth without knowing what I'm talking about---that being the facts of the matter. I'm told the preparation process for the funky finish requires no polishing---that it's accomplished by blasting with an unknown media---I've heard crushed walnut shells. (I know they do a first class job of stripping paint from metal, but that's all I know.) At any rate, the Bright Blue finish (which requires EXPERT polishing) was in short supply at the time----and for a time following WWII.
And I hope you won't call it a "pre" anything! I've always considered the folks using such lingo do so because they don't know the proper name of the predecessor----and don't wish to display their ignorance.
Ralph Tremaine
As an aside, the polishing of a S&W (hand ejector) revolver is more than a difficult task because of all the varying surfaces. Have a look---count 'em---and then compare them to any other maker's product. Dealing with those many surfaces was accomplished with the use of hard leather formed polishing wheels---Walrus hide, so I've been told, one each for every surface on every product---and duplicates so more than one polisher can be at work at any given time. I've seen photographs of these wheels hanging on racks in the factory---a BIG BUNCH of them!! The very best of the aftermarket (re) finishers polish by hand. That sort of thing brings to mind the saying "This is serious business--bring money!"