The difference between Omega 8520 and 8800

The movement of Omega 8520 is a member of Omega 8 series movement family, and it is a reduced version of the main movement Cal.8500, which is mainly carried on ladies' watches. The movement adopts coaxial escapement structure, no card design and silicon balance spring. The whole line 100% passed the certification of Swiss Observatory.

The movement of Omega 8800 is: it is a real hippocampus series, but the coaxial wheel is upgraded to a high diamagnetic material, with smoother tooth tips and enhanced wear resistance. With the silicon hairspring, the 8800 movement has also reached diamagnetism 15000 gauss.

There are many other differences. I hope my answer is helpful to you.