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Rocky_24 · 23 June 2019, 05:12 PM

Hi guys, this may seem as a weird question but it's been on my mind for some time now. I've seen a couple of old Subs and SDs and recognized some spots on their aluminium bezels (like the big dark ones on the photo, but more visible under sunlight), so I was wondering what those could actually be caused by. They look like water stains that cannot be removed. I've heard that UV light can cause discoloration of aluminium bezels, so this would be the only ting that would make sense to me.
Maybe someone knows about what they actually are or if it simply is the metal itself that can't be produced spotless.

faimag · 23 June 2019, 05:32 PM

If you look at a replacement insert, say installed during servicing, they are pretty spotless. So staining is likely usage-induced :)

Onikage · 23 June 2019, 09:02 PM

Bleach or some other chemical. The real downside of alu.

Chester01 · 23 June 2019, 10:42 PM

Not sure. My 16610 sub bezel has some marks, but just don’t care. They were going to replace it at my every 20 year service but told them, no dice I’ll keep it as is.

Rags · 23 June 2019, 10:56 PM

23 June 2019, 09:02 PM	#3
Onikage "TRF" Member Join Date: Feb 2011 Location: England Watch: 16710, 16628 Posts: 7,757	Bleach or some other chemical. The real downside of alu. __________________ GMT II 16710 TRADITIONAL ( D- Serial #) ROLEXFANBOY P-Club Member #4

23 June 2019, 10:56 PM	#5
Rags 2024 Pledge Member Join Date: Jan 2009 Real Name: Chuck Location: SW Florida Watch: 16233,16610,214270 Posts: 11,196	__________________ 16233 Y Serial Datejust 16610 Z Serial Submariner 214270 Explorer *114300 Oyster Perpetual* *76200 Tudor Date+Day*

23 June 2019, 05:32 PM	#2
faimag "TRF" Member Join Date: Feb 2016 Location: US, SG, DK, GR Watch: Reverso Posts: 3,089	If you look at a replacement insert, say installed during servicing, they are pretty spotless. So staining is likely usage-induced :)

23 June 2019, 10:42 PM	#4
Chester01 "TRF" Member Join Date: Jun 2018 Location: East Coast Watch: 16610 Posts: 4,933	Not sure. My 16610 sub bezel has some marks, but just don’t care. They were going to replace it at my every 20 year service but told them, no dice I’ll keep it as is.

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