spotted an extremely rare bird: Jubilee 1755 with salmon dial

Was recently in Paris and visited my favorite vinatage / 2nd hand watch store and woah what did he have on display? A Jubilee 1755 in platinum whose dial had changed color and gone from grey to a gorgeous greyish/salmon (in this picture you see more the grey than the salmon!)
!!

spotted an extremely rare bird: Jubilee 1755 with salmon dial
Never seen that happen in a VC
06/19/2013 - 15:36
Is this what Rolex collectors call a 'tropic' dial? Only I heard sometimes this is 'faked'.... No suggestion of course here... Just commenting. Are there other VC 'known' dial fades/ changes on particular references? This is the first time I've seen it other than on older Rolex, Omega, Longines etc... I have to say I really like it... And I will be in Paris in a month! Maybe you can PM me the location and I can see it if it is still there! Many thanks. Gary
Amazing Alex!
06/19/2013 - 16:54
This must be a custom dial, probably done outside the Manufacture. (??) Why only the guillochéd area affected? I have one of these but when I checked this morning, the dial was still silver :-) Joseph
Re: spotted an extremely rare bird: Jubilee 1755 with salmon dial
06/19/2013 - 17:20
Signor Macedo's ? ;-)
exactly :-)
06/20/2013 - 13:28
nt
Alex....
06/19/2013 - 18:08
can you ask the people at Stern why this might have happened  (for instance, did they put a varnish on most dials and this one was somehow missed?) It's a beautiful effect. Bill
wow ! what a patina ...
06/20/2013 - 07:25
how did the dial oxidised ? sun exposure ? is that dial in platinum or gold ? 
the dial is platinum (nt)
06/20/2013 - 14:10
e
Sublime watch
06/20/2013 - 09:56
Hi Alex, Any idea of what happened? Sublime watch though. I love it Best Dje
Bill, Jerome I think there was a varnish problem but
06/20/2013 - 14:09
need to dig deeper
Looks beautiful...
06/20/2013 - 20:01
Hi Alex, I wonder if moisture penetrated the case due to a loss in water resistance. I would be concerned of rust in the movement, if indeed moisture (humidty/sweat/sea-water) caused the effect. For "naturally occuring" 'tropical', brown-colored dial vintage Rolexes, as mentioned by Gary, the effect is most often caused by moisture entering the case. Best, Paul
A possible explanation...
06/20/2013 - 22:51
Hi Alex, Here’s my take on this watch. Firstly, I realized and confirmed that the watch case, the hands and indices are platinum but the dial is silver guillochéd. Platinum itself is almost inert and general does not react with other chemicals. It is used as a catalyst in auto emission systems and the cis form is used as a chemotherapeutic agent in the treatment of cancer particularly ovarian. But it is subject to corrosion, to some degree. Silver on the other hand can undergo chemical reaction and more particularly is subject to colour change with electrolytic anodisation. I am inclined to think that the dial was changed at some time after purchase. Perhaps there was a coating selectively removed from those parts of the dial to allow the colour change in those areas and left in place in those areas where it maintains the silver colour (seconds track, outer ring of sub-dials). Here is an interesting link to show how it can be done:  http://www.youtube.com/watch?v=VrA7Jyw1uOs   The solution of sodium hydroxide and sulfer is extremely corrosive which would explain the mild colour change in the hands and indices. It’s only a theory… and probably wrong…but…??  
My error, the dial is platinum
06/20/2013 - 23:08
But I still stand by my theory. cool There was a black dial done by Vacheron as wellhttp://www.thehourlounge.com/thread/view/here-you-go_5241_5247.html
The dial is untreated platinum like in the Excellence
06/21/2013 - 00:44
Platine and as such even the smallest contact would mark the dial. However, here the color is too homogenous which is surprising
This is fascinating
06/21/2013 - 03:28
I have a tough time thinking this was natural or by accident.  The finish looks too uniform to me for it to occur unintentionally. Can't wait to see if Stern Creations/VC will be able to explain what happened.
Re: The dial is untreated platinum like in the Excellence
06/21/2013 - 04:40
Alex, Do you know how the salmon colour was done on the Platinum Historique? It must be a similar method. Whoever did it had some knowledge and sohistication and resources to do such a uniform job....fascinating! JB
However it was done...
06/21/2013 - 06:16
Thisis a beautiful watch. I have looked at ths thred too many times. The piece is eye catching and just stunning. And, I think makes an excellent companion to my platinum salmon Historiques ! Best, Joe
the dial on the Chrono Historique is obtained via a galvanic treatemen
06/21/2013 - 14:27
e
Re: the dial on the Chrono Historique is obtained via a galvanic treatemen
06/21/2013 - 18:25
Thanks, Alex, I believe that's the same as electrolytic anodization that I mentioned earlier.
Re: the dial on the Chrono Historique is obtained via a galvanic treatemen
06/21/2013 - 20:44
A sweet baby looking for a new home ;-)) Liger