I bought a Nikon AW AD waterproof camera around 1990 and it worked pretty well. Used it in war zones and wherever the weather or conditions were really bad. Had to send it into Nikon for service about 5 years later and it still works today.
A good friend who happens to own the last surviving camera shop in New Mexico told me that he got a pile of Nikonos equipment in, so I went to look. I bought a very nice Nikonos III with 35mm and 80mm lenses.
In the past I owned a Nikonos V, but quickly let it go - a little too plasticky and I didn’t like that it depended so much on electronics. The III is far better in my opinion - very solid aluminum construction and 100% mechanical.