What is this type of sight called?
... and what do you think of it? Is it a decent sight?

I always called them ladder sights. They work good for hunting a light target work.
Originally Posted By P08:
I always called them ladder sights. They work good for hunting a light target work.
Did you notice it is a dual sight? It flips down to become a regular semi-buckhorn
type of sight. Not trying to be a smart ass; I just don't know much about these
things and thought a ladder sight was ONLY a ladder sight?
When flipped down is for out to 100 yards or so. Flip up for long range. These were used mostly on military lever guns and Sharps rifles. You will also see a windage adjustable type on 1903 Springfield rifles.
Smith? or some similar name sight. I believe they were on a number of leveractions. Buffalo Arms carries them.
To me it doesn't seem refined enough for long range work in reality. I would as soon use a set of full buckhorns. For long range traditional the tang mounted peep sights are where it's at.

There was also the bullseye style Marbles sights which would probably work better than the notched sight too.
Is it a decent sight?
Yes they are ok, but you need to load develop to match the sight graduations. I am having that problem with my US Model of 1917. I need to find the right bullet for the proper ballistic coefficient, along with the right velocity, in order to match POI with POA.
With something like a Lyman 1/4moa click receiver peep sight, like on my Springfield 03, I simply adjust to the specified clicks provided by my ballistic calculator.
Originally Posted By P08:
I always called them ladder sights. They work good for hunting a light target work.
^This^
Winchester put this sight on the 100 Year John Wayne Commemorative 92 as well.
I'd call it a "folding ladder sight". I've forgotten the name for the V-groove rear sight on the ladder sight. When folded, you have a "post and notch" sight. What type of front sight is on the rifle - reactgular blade, bead,...??
How is the v notch that slides up and down supposed to be held in place? I haven't looked at it yet in really good light.
I have one on a lightning pump rifle, that I haven't gotten around to using yet, and there is a hole on the side of it, and I thought a screw or knob was missing to hold it at the elevation you wanted, but the hole doesn't even look like it's threaded. Mine just slides up and down, and falls to the bottom when elevated. What holds it in place?
I'm going by memory, because the gun is in the safe, but I think there are dimples in the left side of the site at various elevation settings, but nothing to hold it up.
The kinds of features you refer to are what separate a good sight from a bad sight from a great sight.
If you know where to put it, it should be good for at least one shot, maybe more depending upon how much friction holds it in place.
That type of ladder sight is intended to have the fold down V notch serve as the "battle sight". At the turn of the century the battle sight setting was a zero at a given distance but it was also set to maximize the "beaten zone" with the caliber in question. That concept basically means the maximum height of the mid range trajectory was at head height to hit a standing soldier with the maximum range then being the point at which it could hit a prone soldier. Depending on the caliber the maximum beaten zone could be 600 yards or so.
The ladder settings were intended for volley fire primarily at longer ranges. In essence, it is accurate enough for a line of troops to engage another enemy formation at ranges where hitting an individual soldier would just be a matter of luck.
That style of ladder sight just clicks into preset notches for each 100 yards. The ladder sight on the M1903 was more refined in that it used a jack screw to give infinite adjustment and used both a v notch and an aperture, each with its own alignment mark. National Match shooters used an aftermarket micrometer tha could be placed over the sight to make precision sight adjustments.
It worked for this man.
