Input Requested: Ref. 2852/2853 SC 18K - "CHRONOMETRE" Dial & Family History

Therein lies your issue - you have knock on the door of the house of "Purist" in pursuit of "non-purist" advice.

The rest is a little harsh - but this was funny.

I think the main issue here is that the OP is approaching this as a set of analytical 'data points' and that is not how the vintage watch market works.

Other than mild historical interest (and only to avid collectors) the Gerlach-produced case thing really is otherwise irrelevant but the OP appears to be fixated on this fact.

Watch buyer of all sorts are driven by emotion not data points.
Collectors (generally) want to buy the most beautiful examples and casual or one-off buyers might buy a watch because they simply like it without necessarily being bothered by originality.

Either way, the OP's uncle's watch will never be ' a survivor' in the sense that a collector might mean and is not going to sell at a premium because it has been polished (further) and had another dial repaint job.
All that will achieve is to reduce the overall return to the vendor.

However, it appears as though the OP has settled on his course of action and appears determined to spend more good money for no apparent reason other than they seem to think they know better than the most knowledgeable collection of Omega buffs to be found anywhere globally.

So, for the final time from me - painful though it is for a Constellation collector to say:
the main value of the watch is in the gold, any more money spent will simply reduce your eventual return, watch the gold market if you will and sell accordingly.

Best of luck.

To reiterate what has been said here by some of the most experienced vintage omega collectors around the value is purely in the gold. In the vintage omega world originality and condition are paramount. Lacking one and in this case lacking both the value lies solely in the parts.