My concern is whether the dial has been retouched. Movement and case look clean to my eyes?

 

The rest could have been good, but not with the Swiss made in this place.

 

The case misses the bezel? Or is it shown in a different photo?
I have seen Omegas with "swiss made" in the same position that were verified by more experienced members on here, but for me it is always a warning sign. Shouldn't the subdial have snailing?

 

The fonts look good to me and the global quality of the prints seems good as well. But like you I have strong doubts concerning the Swiss made. With another caliber, maybe it could be correct, but on a cal 30 I do not think so.

I also think there is no bezel, but maybe it was on purpose.

 

What concerns me much more than the position of swiss made is the lack of circular guilloche on the subdial

 

Bezel was removed for illustrative purposes and matches the crown. Is the subdial circular guilloche expected in the black dialed version?

 

It's expected in pretty much all of these... The lack of it could be due to repainting, which would also account for the, IMO, less than ultra-sharp waffle pattern.

 

I’m leaning redial but I’m not certain. The black dial originals have a certain look to them that this is lacking. Typically shinier gold fonts and more of a faded black with gold speckling. The gold looks to be applied over the black and shouldn’t it be the other way around? That usually results in much cleaner and crisper printing.

 

The watch had previously sold on ebay for £1,300 and is now relisted....

 

This watch seems to have a gilt dial - or sandwich dial to use MacOmega's wording. The OP's watch has gilt like colors, but it looks like print.

I guess the conclusion is redial.

 

I did not notice at first glance, but I agree with the remarks concerning the subdial.
On genuine black dials, the subdial inner circles can be hard to see on pics. But they are here.



The OP's pics are pretty good, so I guess we should see the circles. Must be a thick paint! If so I wonder why it covered the subdial but not the main guilloché. Maybe there were some other work done on the subdial.

 

The second hand also looks too short. On all the other examples, the seconds hands go all the way to the edge of the subsecond dial.

 

Thanks for the info. I learn something new every time I come on here. Did Omega produce printed black dials during this period?

I’m still unsure what I think about the subdial texture. I guess they could have removed the texture during a redial but why? I’ve seen redone dials that still have it. Why go to the trouble?

 

It is definitely redone dial. The minute scale is far away form the hour markers. Omega and seconds scale are printed in gold and minute scale in silver.
Does the 266 movenent should have a screw ballance?

 

The 266 has indeed a screw balance. But I guess the OP's movement has a screw balance, but the pic was taken when the movement was working. If so, it usually gives the impression that the balance is a ring without screws.

 

I do not know! Maybe @ConElPueblo and @mac_omega have an insight.

 

It could, as I mentioned earlier, be due to the repainting; the texture is much finer than the waffle pattern. Btw, @Temprus - I don't think the markers are silver, it's more likely to be the lighting/finer lines that the golden hue looks silver.

 

This is enough to say redial

 

Indeed. I still wonder how the new paint alone could produce such a flat subdial, even if its circles are thin.