[HarryLime]

Originally Posted by miamiclay

Here’s a “sandstone” being offered by Christie’s, idk if it’s the same watch as above or not.

Some things look the same (e.g., 24 minute mark, first O in CHRONOMETER, white fleck under F in CERTIFIED), some look different (e.g., lume on dial and hands, black dots and damage in dial lume appear absent here). Maybe it’s been relumed (or even just very different lighting or filters)?

I expect those with sharper eyes (& more expertise) will be able to supply a definitive answer ...
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My vote is aftermarket.