Rolex time accuracy on my blnr

[brandobot]

I have a blnr purchased in 2013 which has been running and keeping time great until this past month. I started noticing the power reserve was dramatically reduced to under 30 years. (The watch had sat face up on my dresser every night) I hadn't noticed until the next day when the watch was behind a few hours.

I ended up buying a watch winder and putting it in every night. Since then, the watch stays wound, but I've noticed the watch has been about a minute slow each day, requiring my ocd self to adjust the watch daily.

What would cause a watch this modern to suddenly start losing time? Has anyone experienced anything similar?

[Old Expat Beast]

Originally Posted by brandobot

I have a blnr purchased in 2013 which has been running and keeping time great until this past month. I started noticing the power reserve was dramatically reduced to under 30 years. (The watch had sat face up on my dresser every night) I hadn't noticed until the next day when the watch was behind a few hours.

I ended up buying a watch winder and putting it in every night. Since then, the watch stays wound, but I've noticed the watch has been about a minute slow each day, requiring my ocd self to adjust the watch daily.

What would cause a watch this modern to suddenly start losing time? Has anyone experienced anything similar?

30 years is actually pretty good.

Seriously though, have you given it a full 40 winds? Or are you just letting it self-wind only? A minute slow per day is bad, that's not OCD territory.

[weeone]

Perhaps your watch got magnetized?

[natosub]

Magnetization generally speeds a watch up as it effectively shortens the balance spring. But since the 3186 has the Parachrom hairspring this seems unlikely. Im not sure what could make a watch suddenly lose so much time. Definitely should be looked at.

[victorescu]

Maybe it has been dropped by mistake...
it definitely needs a careful look inside the movement
hopefully it's nothing serious

[brandobot]

30 hours, hah. Yes, i've given the full amount of winds.

Never been dropped or slammed against the table.... unless someone came at night, took the watch off my dresser and dropped it and put it back. Guess I'll be visiting the service center