Meccano,
I have a 14 year old Breitling Aerospace, still going strong. I take it to King's Watch at 49 Queen's Road in Central (Tel: 2522 3469) every 3 years or so for the battery replacement. Last done just 5 months ago for HKD200.
If you require certified pressure testing, or need any of the newer Breitling's serviced (they have a different back requiring specialised tools), I would suggest going straight to the aforementioned Breitling China Service Centre above the Macau Ferry Terminal:
Unit No 1416
14/F China Merchants Tower
Shun Tak Centre
200 Connaught Road
Central
Hong Kong
Tel: 2376 0909
I also have a Breitling Airwolf Raven which I have serviced there, as it cannot be serviced anywhere else (that I know of?). Cost for battery replacement in October 2012 was HKD 250 (no pressure testing). They did this while I waited (20 mins).
Good luck!
ITG
Last edited by Intransitgent; 2nd Apr 2013 at 13:14.