My more modern (year 2000 and up) Omega's go to the Swatch Service Center in Melbourne. My 2230.50 is there at the moment and ready to be send home. Unfortunately it 'll be there for a while yet as they had to shut down the Service Center because of the Corona restrictions.
Anyway, I still have my 2254.50 to wear that was serviced by them this time last year.

 

My Rolex are serviced by Max Schweizer Swiss Watch Service in Sydney. Rolex trained. I have always been very happy with their service and pricing. Ralph is easy to communicate with and they also bought a couple of my Rolex watches when I reduced my collection. I am sorry I had to let the SeaDweller go, but such is life.

 

Read that Joao Santos in Enmore (Sydney) is very good but haven't had any watch serviced by him yet. Does anyone here have experience with him? Used Max Schweitzer for a vintage chrono and received very good service.

 

Have heard good things about Phil and but not sure he is still in business?, his website no longer exists. He always had interesting pieces for sale too.

 

Another vote for Max Schweizer - I've used him for years and bought a couple of watches from him, too - a Fortis GMT Pilot Pro Chrono, and a Rolex GMT Master II.