The twin barrels in series or parallel? 80 hrs at 5 hertz is very good performance. COSC is -4/ + 6 in five positions at 8, 23, 38 degrees , each trial is 24 hrs making a total of 15 days. If GS is tested at 6 positions, then how can they accomplish this in 17 days? FP Journe chronometre is also tested in 6 positions. Anyways, GS is really great bang for the buck, the new movement looks well finished, and is very pretty , though like most movements nowadays there isn't any sharp hand finished interior angles. But at this price point, what more can one ask for?
That's why they incorporated two systems to the escapement, I guess that in theory similar to the Coaxial escapement by George Daniels , later sold to Omega, the wear should be reduced.
unlike the swiss who puts them in an oven , GS claims that their blued screws and hands were heated to 290 degree Celcius the traditional way , by hand over a fire. So I guess that they are reserved for higher end watches.
If that’s the case, call it 9SA5-1 or give it some sort of designation for a less inferior model. I don’t see Rolex making any changes to their 3135 or 3235 movements when they are cased in precious metals or regular stainless steel.
