Reviving this thread with a slightly different question...
I had the AF 24mm f/2.8 as my first wide angle beyond 28mm, back in 1990's. Used it only a bit but was never pleased with it. Sold it to fund the AFD 70-300ED some years later. I did not have another 24mm Nikkor until much later, and I shooting style for wide was developed around 20mm f/3.5 Ai (I still regret selling it). I bought the 24mm f/2.8 K lens and got it modified by Nikon, used it sparingly, was ok with the results. I am not sure if it is due to my preference to 20mm or the performance.
I just picked up another beaten up 24mm f/2.8 K, also factory modified, that I will need to put in some work. Perusing Roland's excellent data base, I found out that there are really only 2 versions of the 24/2.8: the 9/7 version up to K, and 9/9 from Ai and beyond. Earlier literature, like Moose Peterson's Nikon Handbook, and Bjorn's post a few before this, indicated that the 9/7 design is good. Other classic Nikon lens forum threads (like Fred Miranda) seem also to indicate a strong performer in the 9/7 design.
Question: what is your opinion of the 2 versions, 9/7 vs 9/9?
My faint memory of the 9/9 AF lens is that it is bad, as bad as the AF 28mm f/2.8 - which along with the modern kit lenses, are the worst Nikkors I have experienced. The AFD 28/2.8 is only slightly better, and should really go into the local Craiglist ...