I have an 8-month old Aerospace Avantage which until last week was keeping exemplary time..... within the 15 seconds a year spec. In fact, since Sep 1st, it had gained 3 seconds. I wear it 24/7, except in the shower. I don't check it against WWBV every day but I do about once a week. Just by way of explanation, I'm an accuracy freak and also have a Citizen Chronomaster, another thermocompensated quartz, with a spec of 5 seconds a year. It is also worn 24/7 and has been spot on since May.
The minute hand on the Breitling moves twice per minute, at the 30 and 60 second point and I have been in the habit of checking the minute hand movement against the seconds-hand of the Citizen, and seeing the minute hand move about 3 seconds before the Citizen reached the 6 o'clock or 12 o'clock points.
On Monday, I noticed that the Breitling minute hand moved on schedule but then noticed that the Breitling's minute hand was two minutes behind the Citizen's.
I checked them both against WWBV and found that the Citizen was still spot on while the Breitling minutes-hand was two minutes slow but was moving, as before, 3 seconds early.
I can't say exactly when the two minutes vanished or whether they went suddenly or over a period. My first thought was that maybe the minute hand momentarily lost its grip, but to lose it and then regain it firmly enough to follow the half-minute schedule doesn't seem to make any sense.
Has anyone ever come across anything like this before or does anyone have any idea what would cause it? Any thoughts would be welcome. I've sent it back to Mr. Breitling via the AD but I doubt if he will tell me what he found, if he found anything, and I'm a little apprehensive that he will watch it for a few days and then send it back saying he can't find anything wrong.