Welcome
First of all Congrats on your new Breitling. You don’t have to worry about non in-house movement. Maybe it’s not nicely finished as in-house Breitling movements but you have closed case back so you can’t take a look. So non in-house movements are easier and cheaper to service and most of watchmakers can do it for you and I would like to ask that spear parts will be available easier and service time will be quicker. Enjoy it
