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Old 17 December 2018, 12:57 PM   #1
purestrike
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What color are the mounting (bezel) screws for AP 15202ST?

I have seen pics where they look like the steel (silver-ish) and pics where the look almost gold.

This is the starkest example I can find and it happens to be the old model but I see a lilttle yellow tinge even with the post 2012 versions? Is it a age/oxidation thing?

If I bought a new 15202 today, will the screws turn yellow in 5 years?

Thanks!
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Old 17 December 2018, 10:13 PM   #2
Burlington
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I believe they are white gold in the jumbo as per the RO range.

What is apparent is they are so highly polished they exhibit an almost poli noir effect in different lighting.
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Old 17 December 2018, 10:15 PM   #3
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That is not common, shouldn't happen.
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Old 17 December 2018, 11:10 PM   #4
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They are white gold so the hue is warmer than steel
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Old 17 December 2018, 11:49 PM   #5
tyler1980
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What color are the mounting (bezel) screws for AP 15202ST?

its WG and it looks yellow-ish in certain light because it's gold.... like this on my 15400




And they look white in other light

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Old 18 December 2018, 12:46 AM   #6
sirish19
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The screws are white gold and definitely look a bit yellow in the right light against the steel bezel. Definitely gives it a lot of character.
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Old 18 December 2018, 04:56 AM   #7
purestrike
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Wow a chameleon, makes me like it better, thanks guys!
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Old 18 December 2018, 06:52 AM   #8
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It appears that in the OP pic that the rhodium plating of the "white gold" screw has been wore down/perhaps polished off. First off, there is no white gold btw. White gold is usually gold plated with rhodium. I had a white gold piaget ring which turns yellow from wear and tear. Hope this helps.
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Old 18 December 2018, 07:00 AM   #9
tyler1980
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Quote:
Originally Posted by blacke90 View Post
It appears that in the OP pic that the rhodium plating of the "white gold" screw has been wore down/perhaps polished off. First off, there is no white gold btw. White gold is usually gold plated with rhodium. I had a white gold piaget ring which turns yellow from wear and tear. Hope this helps.
its not plated in the past i believe that was the case though. technically the term is grey gold i believe but Rolex and Patek are good examples and the color is the color all the way through. I cant imagine AP is different.

So if you cut a WG watch case into a cross section its the same all the way through. Im sure plating is common generally but not always.

maybe screws are different, but for sure there is such a thing as white gold that doesn't need a plating.
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Old 18 December 2018, 07:30 AM   #10
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Quote:
Originally Posted by blacke90 View Post
It appears that in the OP pic that the rhodium plating of the "white gold" screw has been wore down/perhaps polished off. First off, there is no white gold btw. White gold is usually gold plated with rhodium. I had a white gold piaget ring which turns yellow from wear and tear. Hope this helps.

WG is an alloy of gold (Au) and one or more other metallic elements.

Gold in its natural state is yellow - but the alloying discolours this to a whiter hue, exactly what the blend is will determine the colour.

Most white gold jewellery is then usually rhodium plated to give a very hard and shiny surface, but as Tyler says not usually on high end watches as specialist gold alloys are used which don’t need coating in Rh.
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Old 18 December 2018, 07:44 AM   #11
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Got it. How do you explain the pic that the OP posted.

Quote:
Originally Posted by Burlington View Post
WG is an alloy of gold (Au) and one or more other metallic elements.

Gold in its natural state is yellow - but the alloying discolours this to a whiter hue, exactly what the blend is will determine the colour.

Most white gold jewellery is then usually rhodium plated to give a very hard and shiny surface, but as Tyler says not usually on high end watches as specialist gold alloys are used which don’t need coating in Rh.
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Old 18 December 2018, 08:09 AM   #12
tyler1980
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Originally Posted by blacke90 View Post
Got it. How do you explain the pic that the OP posted.
first off its an older watch. AFAIK patek plated WG into the early 2000's but don't currently so its an evolving process. Maybe that particular older AP was plated.

Secondly WG has a gold tint to it in certain light because its still 75% gold which is yellow. Its subtile but its very much more of a warmer looking metal vs SS. You can spot it instantly and i don't think a WG watch and a SS watch look alike at all. So, if you have both SS and WG on the same watch case its really obvious like a SS bezel and WG screws. its not supposed to be pure white and its not that the plating wore off.
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Old 18 December 2018, 01:05 PM   #13
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Perfectly explained
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Old 18 December 2018, 04:50 PM   #14
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https://www.rolexforums.com/showthread.php?t=467129

Here is a helpful thread that explains that sometimes the white gold screws start having a yellowish hue over time due to the lack of rhodium plating on the outer layer of the gold because of how small the screw is..
But then again Rolex has white gold markers and hands.. and they are pretty small.
Is it possible they polished the screws as well when polishing the watch? idk just a thought.. and yes that watch in the first pic is 100% polished and not at AP
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