After getting the Longines sector dial yesterday, Nico suggested to see both the Longines and the CK859 side by side. When I first got the CK859 earlier this year, I thought these two reference were too similar to get them both. However I could not get the Longines out of my head even after getting the CK859 so finally decided to also add the Longines. I find both very different. Of course the movement on the Omega is much nicer, but both have silicon spring, and both performs as superb chronometers (within 2 sec/day)!