It would be interesting to know by exactly what margin Breitling modify their movements.
Omega have 'modified' some of their ETA movements in the past, but it's just amounted to cosmetic tinkering and a bit of engraving.
Must admit that as much as I love nice watches, some of the spec. differences really are nit-picking in the extreme.
Rolex cases for example, use a 'higher quality' stainless steel than do their Omega counterparts.
The difference is: The Rolex steel can withstand certain chemical attacks better than the Omega steel.
Useful where that grade of steel is employed in the manufacture of industrial plant for chemical handling, but absolutely sod-all difference made to anything in the world of wristwatches.
I think if I were being exposed to heavily corrosive chemicals at high temperatures one of the least of my priorities would be its effect on the surface finish of the casing of my watch!
