If the papers are
completely blank - i.e. specifically no dealer stamp/signature on the inside back cover - then you will have problems as that tells Breitling that it came from an official AD.
However, a number of AD's seem to <ahem> "forget" to fill in the date on an otherwise completed warranty booklet (i.e. they put the dealer's stamp in it but leave the rest blank) which allows the customer to complete the missing date at their leisure at a later stage, and thereby benefit from the warranty for a little longer than they otherwise should.
I guess it depends on what level of incompleteness you have on your docs.
Alternatively you could just phone BUSA or BUK (depending where you live) and ask them whether the warranty will be valid. You don't have to tell them your name, and you could always just ask hypothetically.
