I picked this up via Craig's List in a very nice lot from a player who was active in tournaments in the late 80's / early 90's. It looks very much like the AGD Sharpshooter
sight (angles, hardware, surface treatment) except for the lack of branding on the top surface:
Close up of the front sight pin assembly:
...and the mounting hardware:
If not AGD, who else manufactured this type of sight? Any idea what these are worth (methinks the AGD museum exaggerates the scarcity of its old products somewhat)?