Just speaking for the one I own, but on left grip front strap inside(remove grips
) is NA RDGFLD NJ. Which is Navy Arms, Ridgefield, NJ.
Navy Arms advertised several "different grades" of Brazillians in SGN GL etc when they were first imported, circa 1988. I "bit the bullet", and paid their top price for the highest grade ORIGINAL finish gun. A very fine S&W original blue, but certainly not the top civilian "polish". BUT- my gun is in the 111k number range, so a left over wartime 1917 frame that wasn't shipped.
If I recall correctly, as least Navy Arms, offered an "arsenal refinish" grade gun for a less cost than mine. Well, it was what I call a "hot dip blue" over pitting!
There is one of these,or was on Monday, at KTP for $325. Looks great,certainly better than the 40 to 50% finish examples, UNTIL you get within in a foot of it, in the right light.
Reminds me of a lady I picked up in a bar, when I was in my late 20's! The daylight(and my being sober by then) showed her "wear and tear"....but her 'action was smooth, and accuracy great', despite being "vintage"!
Bud