Thanks for the replies and the welcome, gentlemen! I now have read many threads here and around the rest of the 'net since my initial post so I think I have this pistol figured out with your help of course.
It seems to be a very late "Classic" CZ-75 that has had that 3-dot Bo-Mar sight system added, and a target trigger job done on it. The top of the slide was milled flat to accommodate the rear adjustable target-type sight, and the front sight is a target pattern as well. Probably done by some extremely talented gunsmith, since it frankly looks like factory quality work - or better. I had the pleasure of sneaking out to the desert during my lunch hour and shooting it for the first time today. The trigger is so light that during the first couple of mags I accidentally "double-tapped" it a couple of times! I have some pistols with great triggers, but frankly none this light. I need to put a trigger gauge on it, since it may well be less than 2 pounds. This particular CZ is going to be relegated to target use only in my collection. The trigger seems to be too light for defensive use, but way too nice to mess around with it. A real joy to shoot, and I just love it. If I can add a trigger stop to it while retaining the double action capability I think I may give that a shot.
I can't believe I have been through so many handguns over the years without trying out a CZ-75. I'm hooked after only 60 rounds, and may even sell a couple of my 1911s to fund the purchase of some more of them. I see why so many of you guys are hooked on these fine pistols. The only downside is that I can see myself spending a lot more on 9mm ammo than I usually do!
Best to all here, and thanks for all the great information. This is by far the finest forum on the internet to research the great CZ-75. (Should have listened to the late Col. Cooper sooner on the CZ as much as I did on the 1911!)
Doby Pilgrim
Santa Fe, NM - USA