Unfortunately, having someone refinish a 7750 is going to cost more than the movement is worth provided you can find someone who is actually willing to do it.
Get a Ball watch. They are built well and have all the fancy science things to back them up, which he will probably appreciate (I know I do) with the addition of tritium. They have some very nice titanium models.
This is potentially a six figure watch. This condition is unacceptable. Don't buy it. For the amount of vintage watches I've seen, this is not common whatsoever.
One picture is not all that helpful, but please check if it stamped 18KT or 750? If it is not, it could be plated. The only other explanation I can think of is this is a form of chlorine corrosion that is attacking the alloy. It looks like a chemical reaction as a clear copper line can be seen. Has
The reason this is occurring is because the case isn't solid gold. It looks to be heavily plated gold on steel. My guess would be that there was a flaw in the plating or abrasion of the finish allowing water and oxygen to attack the steel. This produced a reaction that blistered the plating undernea
It's available, but it costs an arm and a leg and to have someone else do it for you will be over 5K. I wouldn't suggest writing G-Code yourself, either, unless you are versed in it.
This has nothing to do with accuracy. There are curb pin regulators in CSOC chronometers. This has everything to do with novelty. It looks cool and that is about it; it's not even a marvelous feat of mechanical engineering. They are trying to be different and, by doing so, they can justify the extra