1917 SA rebuild rear sight question

[doymc]

As a new member, Hello to all. I just got a 1917 revolver that looks to be a Springfield rebuild and maybe a reblue at the same time. The frame, cylender and barell all bear a crisp eagle's head inspector mark. The finish is a mint high polished blue that is beautiful. The one odd feature is that an adjustable rear sight was added at some point and does anyone know if this may have been added at the rebuild? A tapped hole was added to the right side and the color matches the bright blue. The sight is marked R.D.L. pat pending. and has a wide notch.
Thanks for looking, DOYMC
http://i1190.photobucket.com/albums/z455/doymc/IMG_0841.jpg
http://i1190.photobucket.com/albums/z455/doymc/IMG_0842.jpg

 

[mikepriwer]

1917's were not adjustable-sighted guns . I don't recognize the
R D L, but it would have been added some time after the gun left
the factory. Pictures would be a big help.

Mike Priwer

 

[Odessa Straight]

I'll bet it's a Wondersight. Could it be F.D.L. instead of R.D.L.? The Wondersight screws to the frame at the top side plate screw hole. Wondersights are still for sale and I have one on my 1917.

 

[handejector]

Welcome to the board.

The frame, cylender and barell all bear a crisp eagle's head inspector mark.

Those marks were put on the gun when they built it. They are usually seen on WW I 1917's except very early ones which just have a large "S" for the inspections.

 

[Mike SC Hunter]

Bet its a Wonder Sight. Friend has one like that that i borrow sometimes. Not a tapped hole. Sight attachment screw takes the place of the upper side plate(bug) screw.