You are looking at a new and unused , still in its display pack Millett Smith & Wesson N Frame, White Outline Adjustable Rear Sight . This sight has the square ending tang, not the current rounded tang. It should be a straight replacement fit on post 1974 N Frame Models. It will also fit TAURUS pre 1988 large frame revolvers when fitted with an S&W T nut. This sight is ideal for guns with 4 inch barrels or longer. Sight & adjustment tool is $100 shipped. I accept USPS Money Order or PayPal. Last photo shows the sight mounted on a Colt Trooper. Sold!
Full instructions are in the pack.
Guns listed for the .360 sight blade are:
4” – 24, 624, 29, 629, 57
6-6 1/2” – 25-2, 24, 624, 27, 29, 629, 57
8 3/8” – 25-2, 24, 624, 27, 29, 629, 57
Two of the photos are standard, just to show how the sight blade & adjustment tool look.