My Aerospace need a new battery recently - TWG quoted "up to 10 weeks...!"
After a bit of research, I took it to Peplows in Worcester high street - He's a Rolex trained watch repairer and agent so he has a reasonable idea wot he's doing...
New battery, seal and pressure test was £18.00 - Wifey dropped it off in the morning, picked it up late afternoon.
Don't bother if the watch is actually broken - Breitling won't sell him or any other watch maker the parts...
Nige