Welp, I went and picked it up today.
First thing I did when I got it home was put a couple of batteries in the vintage Aimpoint. It worked like a new one.
Next thing I did was to remove the Aimpoint and the Picatinny rail to see what was under it. That was a much bigger job than it sounds. Taking the Aimpoint off was easy enough. Just 2 screws that loosened up pretty easily. However, the 3 screws that held the Picatinny Rail on the slide were a different story all together.
The original owner who put the optics on this pistol obviously NEVER intended for them to be taken off. The screws were liberally glued in place with RED Loctite. LOTS of it. You can even see some traces of the excess on the top surface of the slide.
It took heating both the rail and the slide with a butane torch to soften up the Loctite enough to get the screws out - especially the center one. I darn near stripped it out before I finally got it loose.
Of course I was hoping against hope that the front sight would still be there fitted into a slot cut in the underside of the rail. Alas, it was not to be. Once I got all the screws out and removed the rail I found exactly what I expected underneath. The front site is gone, machined off the slide.
A pity that someone chose to do something so irreversible to such a classic gun that is otherwise in such incredible shape. It's obvious that the owner decided to make the gun into what he wanted with no intention of ever letting it go. Since it came from an estate sale I guess it is pretty safe to say that he followed through on that intention.
So, now I'm on the hunt for a new slide. Though I also intend to silver solder a front sight on this one and install the Bomar rear sight that Sevens was gracious enough to sell me.
Below are a few photos of the slide with the rail removed.