Please take pics of this camera and begin a separate discussion because those of us who have been around Nikon's for a lifetime have never seen such a thing. Perhaps an early replacement of an FT3 top piece with an available FT2 one? by a service center?? For whatever lost reason??? But the thousands and thousands of remaining FT2's (of which I own 2) do not have the AI capacity.
Oh dear. you have opened a can of worms. I have re-examined mine and where the serial number is on the top plate, the white paint on mine has partially been worn away and the model designation actually looks like the letter FT2. The figure in the 'FT3' designation part of the serial number that is partially removed is only readable in oblique lighting.
This makes it more of a bargain for me because FT3's attract a higher price than FT2 models. In UK expect to pay around the £170-£190 mark for a good FT3 in chrome. My FT3 is very definitely in black, virtually unmarked and I only paid £79 for it. It was clearly advertised on the dealers website as a FT2 and that is what it said in the receipt.
You have made my day!
That explained, it has got me thinking. I about my D90. I bought this on a whim for a very reasonable sum. It has very little obvious signs of use but it has obviously been seriously modified. The screen which is not interchangeable (normally) but it is a screen that I would expect to find in a manual film camera with a split image rangefinder and etched grid lines. The AF works normally and corresponds accurately with the split image rangefinder.