[dsio]

I think its going to be interesting how Rolex responds to the Cal 8500/9300 series, as far as the Cal 31xx I think that movement series is dead in the water and on the verge of retirement. The Sky-Dweller Cal 9001 shows the lessons they've learned from the Cal 4130/4160 Daytona / YM2 movements, which are a decades ahead of Cal 31xx, and that 9001 in its uncomplicated form will probably be the time-only movement Rolex uses to combat the onslaught of new in-house movements now that ETA is forcing manufacturers to make their own.

Frankly I think the only reason Rolex kept the 31xx so long is that with everyone else using ETA movements they had no reason to spend the money.