1675 GMT insert aging, natural?

befobe
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Hi OF,
Fond of Omega, I also love GMTs...
So, always keeping an eye on redback inserts for 1675, and I would like your opinions about this one.
I don't contest the Rolex provenance, late 70's.
What is strange to me is the aging of the red area. Especially the close views I made.
How can this happen naturally?...

Happy to hear from you, Omega&Rolex guys!
B.
IMG-20250629-WA0007.webp IMG-20250629-WA0008.webp IMG-20250629-WA0013.webp IMG-20250629-WA0012.webp
 
josiahg52
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Fading is most certainly normal for anodized parts subject to UV light exposure. Red is very susceptible, blue can fade also. It depends on the dyes used. There is overlap between the two colors and the shade is slightly different there.
 
Aditor
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befobe befobe
Hi OF,
Fond of Omega, I also love GMTs...
So, always keeping an eye on redback inserts for 1675, and I would like your opinions about this one.
I don't contest the Rolex provenance, late 70's.
What is strange to me is the aging of the red area. Especially the close views I made.
How can this happen naturally?...

Happy to hear from you, Omega&Rolex guys!
B.
IMG-20250629-WA0007.webp IMG-20250629-WA0008.webp IMG-20250629-WA0013.webp IMG-20250629-WA0012.webp
In my opinion, it's a natural degradation. Artificially made inserts always have areas where you can identify either the acid or the brush that created the color change. Here you can see the color change of the pigments. In my opinion, those areas that remained redder could have arisen from the heavier masking during the pad printing of the blue before anodizing. But I've never seen it in other inserts. That said, I don't think it's abnormal. If they had separated the two colors with tape during the artificial color change, it would, in my opinion, be a more defined cut.
 
befobe
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I see, and I appreciate your explanation. That's a unique insert.... (Too expensive for me but really attractive....)
 
Aditor
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befobe befobe
I see, and I appreciate your explanation. That's a unique insert.... (Too expensive for me but really attractive....)
i understand!!
 
southtexas
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It can help to see the back. But I had one from the same era that was very similar to that fade, and it was natural.
 
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