Hmmm well durability isn't exactly what people normally associate with gold, unless you're talking about its reactivity resistance so it doesn't tarnish for no reason.
The reason why your hands turn color has probably more to do with when you "gave friction" with the sand paper, it wore through the surface plating and exposed the yellow brass underneath. Not a problem if dealing with solid white-gold like in Rolex or anything that's not had a surface treatment of some kind.
Yesterday I had a very hard time trying to put the watch back together. The clamp is really difficult to put back. I also had to reduce thickness with a dremel, it was 1.8mm now it's 1.5mm and should enter. Anyway while trying a spring dislodged and now I hope I can put it back.
A good try. I have blown the photo up to take a look, the teeth are too high and you have the wrong angle each side, it will be hard for the teeth to mesh when it makes contact with other teeth. I think it will jam up.
Hi everyone, I did a bit of investigative work on the 7625 last night and found some strange behaviour with the timing. I am not too concerned about the beat error as I think that can be corrected by turning the hairspring collet a touch. The slow variation however surprised me as I have never seen it before. I think it is due to wear between the barrel arbour and the barrel cap causing the barrel to be able to tilt as it rotates. I can see that the arbour is very loose in the barrel cap hole. This is causing around 0.3mm up and down play (tilt) at the edge of the barrel. The arbour doesn't appear to be loose in the plate bushings. Does my diagnosis sound feasible? I'm guessing I would need a new barrel or arbour or both to fix the issue. Thanks for any help in advance. Steve.