Prewar National Match adj sight variations?

Mullin has a photo of C201100 with the same sight, with shipment in May of 1940.

Yea I see the one in American Beauty, but I don't know if it has the elevation screws, plugs or the last variation with neither. I guess it probably doesn't matter but just wondering .

I know that's the same sight used on 1st series Woodsman match targets. I thought the one with neither was the first variation, then added screws to prevent movement, then plugs. Any clarification will be appreciated.
Thanks

First Type Stevens Rear sight had the two adjusting screws in the rear sight blade and were used on the earliest Colt MT Woodsmans; Shooters complained of the use of friction to hold and maintain elevation was causing problems and was unacceptable. The later Rear Sight was an improved version with a coil spring tension and other changes that did away with the two friction binding screws that adjusted elevation. Roper gives a detailed description of the rear sight evolution in his book "Experiments of a Handgunner" on pages 56-58. It was his improvement that resulted in the last version that was used on the later Service Ace and NM's. IMO, I think some early rear sights have been modified by using the Roper spring Improvements and replacing the two screws with dummys for appearance. Later versions did away with the binding screws. Fig 14 on page 57 shows a picture of a similar MT Woodsman modified rear sight with dummy screws in place. Jackson.

That is one beautiful pistol.

Nice piece! Envy.

Indeed, a very nice pistol.

I think there may be one posted on eBay now. I think it is the newer or later style Stevens sight. I am looking for an early model Stevens sight for my NM. Thanks for your post.

Gorgeous. I assume a NM that late is equipped with the Swartz Safety. Does your letter state "New Safety Device"?

The earliest Colt NM adjustable sights had the windage screw hole situated to be mainly through the frame of the pistol. Later sights have that screw hole moved up to be mainly in the sight body as shown in the above post.