Hi ScottR,
I should have added that the safeties for Winchester were made by Sub-Contractors. Eaton Pond for the "EW" marked ones and Sargent Co. for the SW marked ones. Also should have added that "EW" marked safeties were also used in the rotary or flip type IV style late into Winchesters production, according to Riesch. I personally haven't seen a flip safety marked "EW".

When I stated.....
" Winchester IMHO had some lack luster milling styles.... some almost to the point of being sloppy. Not in fit, but the milling varied greatly"
I had strayed from the markings of the safeties and was just throwing out a personal opinion about Winchesters milling work.
I should have clarified that in my post.

Thanks for the additional info.
As always your input is helpful and greatly appreciated.

Regards
Charlie-painter777